# The Theories and Behavior of Gas

Prof. Liwayway Memije-Cruz is an author, educator and speaker. She teaches science subjects in different universities and colleges.

## Objectives:

Upon completion of this lesson, the students should be able to:

1. Become familiar with the basic characteristics of gases
2. Understand the postulates of the Kinetic Molecular Theory as applied to gases
3. Explain how the Kinetic Molecular Theory accounts for the properties of gases
4. Apply the relations of volume, temperature, pressure, and mass to solve problems on gases

## Introduction

What makes a gas different from a liquid and a solid?

Gas is one of the three forms of matter. Every known substance is either a solid, liquid or a gas. These forms differ in the way they fill space and change shape. A gas, such as air, has neither a fixed shape nor a fixed volume and has weight.

### Properties of Gases

1. Most gases exist as molecules (in the case of inert gases as individual atoms).
2. The molecules of gases are randomly distributed and are far apart.
• Gases can be easily compressed; the molecules can be forced to be closed together, resulting in lesser space between them.
• The volume or space occupied by the molecules themselves is negligible as compared to the total volume of the container so that the volume of the container can be taken as the volume of the gas.
• Gases have lower densities than solids and liquids.
• The attractive forces between molecules (intermolecular) are negligible.
3. Most substances that are gaseous under normal conditions have low molecular mass.

## Measurable Properties of Gases

PropertySymbolCommon Units

Pressure

P

torr, mm Hg, cm Hg, atm

Volume

V

ml, i, cm, m

Temperature

T

k (Kelvin)

Amount of gas

n

mol

Density

d

g/l

## Note:

1 atm = 1 atmosphere = 760 torr = 760 mm = 76 m Hg

Temperature is always in Kelvin. At absolute zero (0K), molecules stop moving entirely, the gas is as cold as anything can get.

Standard Temperature and Pressure (STP) or Standard Conditions (SC):

T = 0 0C = 273 0K

P = 1 atm or its equivalents

## Postulates of the Kinetic Molecular Theory

The behavior of gases is explained by what scientists call the Kinetic Molecular Theory. According to this theory, all matter is made of constantly moving atoms or molecules. Because of their mass and velocity, they possess kinetic energy (K.E. = 1/2mv). The molecules collide with one another and with the sides of the container. There is no kinetic energy lost during collisions despite the transfer of energy from one molecule to another. At any given instant, the molecule does not have the same kinetic energy. The average kinetic energy of the molecule is directly proportional to the absolute temperature. At any given temperature, the average kinetic energy is the same for the molecules of all gases.

## Gas Laws

Several laws appropriately explain how the pressure, temperature, volume and the number of particles in the container of gas are related.

### Boyle’s Law

In 1662, Robert Boyle, an Irish chemist, explained the relationship between the volume and pressure of a sample of a gas. According to him, if, at a given temperature, a gas is compressed, the volume of the gas will decrease, and through careful experiments, he found that at a given temperature, the volume occupied by a gas is inversely proportional to the pressure. This is known as Boyle’s Law.

Equation:

P = k 1/v

Where:

P = pressure of a gas sample

V = volume of a gas sample

K = a constant

Therefore: PV = k

At a given temperature, the product of the pressure and volume of a gas must be constant. If the pressure is increased, the volume must decrease to maintain the constant product. For a given gas sample to be studied under different pressures, the following expressions must hold:

P1V1 = P2V2

Where:

P1 = original pressure of a gas sample

V1 = original volume of the sample

P2 = new pressure of a gas sample

V2 = new volume of the sample

Example:

A sample of a gas entrapped in a cylinder with a movable piston occupies a volume of 720 ml under a pressure of 0.375 atm. What volume will the gas occupy under a pressure of 1.000 atm when the temperature remains constant?

V1 = 720 ml P1 = 0.375 atm

V2 = ? P2 = 1.000 atm

V2 = 360 ml x 0.375 atm/1.000 atm

V = 0.27 ml

## Boyle's Law

### Charles' Law

The French chemist Jacques Alexandre Cesar Charles, in studying the relationship between the volume of a gas and its temperature, discovered that the volume of a gas increases by 1/273 for its degree centigrade its temperature is increased. From this he reasoned that a temperature of -273 degrees Celsius, was the lowest possible attainable temperature. He called this temperature absolute temperature, and established the absolute temperature scale which is related to the centigrade scale as:

A = 0C + 273

A = 0F + 273

These expressions are used in finding the absolute temperature when the centigrade or Fahrenheit temperatures are known. Charle’s Law states that at a given pressure, the volume occupied by a gas is directly proportional to the absolute temperature of the gas.

Equation:

V = K T

Where:

V = volume of the gas sample

T = absolute temperature of the gas sample

K = a constant

Therefore:

V/T = k

For a given sample, if the temperature is changed, this ratio must remain constant, so the volume must change in order to maintain the constant ratio. The ratio at a new temperature must be the same as the ratio at the original temperature, so:

V1 = V2 /T1 ­= T2

V1T2 = V2T1

Where:

V1 = original volume of sample of gas

T1 = original absolute temperature

V2 = new volume of the sample

T2 = new absolute temperature of the sample

Example:

A given mass of gas has a volume of 150 ml at 25 0C. What volume will the sample of gas occupy at 45 0C, when the pressure is held constant?

V1 = 150 ml T1 = 25 + 273 = 298 0K

V2 = ? T2= 45 + 273 = 318 0K

V2 = 150 ml x 318 0K/2980K

V2 = 160 ml

## Gay-Lussac’s Law

Gay-Lussac’s Law states that the pressure of a certain mass of gas is directly proportional to its absolute temperature at constant volume.

P1 /T1 = P2/T2

Example:

An LPG tank registers a pressure of 120 atm at a temperature of 27 0C. If the tank is placed in an air-conditioned compartment and cooled to 10 0C, what will be the new pressure inside the tank?

P1 = 120 atm T1 = 27 + 273 = 300 0K

P2 = ? T2 = 10 + 273 = 283 0K

P2 = 120 atm x 283 0K /2990K

P2 = 113.6 atm

## Combined Gas Law

The Combined Gas Law (Combination of Boyle’s Law and Charles Law) states that the volume of a certain mass of gas is inversely proportional to its pressure and directly proportional to its absolute temperature.

A gas sample occupies 250mm at 27 0C and 780 mm in pressure. Find its volume at 0 0C and 760mm pressure.

T1 = 270C + 273 = 300 0A

T2 = 00C + 273 = 273 0A

V2 = 250 mm x 2730A/3000A x 780 mm/760 mm = 234 mm

## Ideal Gas Law

An ideal gas is one which follows the gas law perfectly. Such a gas is non-existent, for no known gas obeys the gas laws at all possible temperatures. There are two principal reasons why real gases do not behave as ideal gases;

* The molecules of a real gas have mass, or weight, and the matter thus contained in them cannot be destroyed.

* The molecules of a real gas occupy space and thus can be compressed only so far. Once the limit of compression has been reached, neither increased pressure nor cooling can further reduce the volume of gas.

In other words, a gas would behave as an ideal gas only if its molecules were true mathematical points, if they possessed neither weight nor dimensions. However, at the ordinary temperatures and pressures used in industry or the laboratory, molecules of real gases are so small, weigh so little, and are so widely separated by empty space that they follow the gas laws so closely that any deviations from these laws are insignificant. Nevertheless, we have to consider that the gas laws are not strictly accurate, and the results obtained from them are really close approximations.

## Graham's Law of Diffusion

In 1881, Thomas Graham, a Scottish scientist, discovered Graham’s Law of Diffusion. A gas that has a high density diffuses more slowly than a gas with a lower density. Graham’s Law of Diffusion states that the rates of diffusion of two gases are inversely proportional to the square roots of their densities, providing the temperature and pressure are the same for the two gases.

## Self-Progress Test

Solve the following:

1. The volume of a sample hydrogen is 1.63 liters at -10 0C. Find the volume at 150 0C, assuming constant pressure.
2. The pressure of air in a sealed flask is 760 mm at 27 0C. Find the increase in pressure if the gas is heated to 177 0C.
3. A gas has a volume of 500 milliliters when a pressure equivalent to 760 millimeters of mercury is exerted upon it. Calculate the volume if the pressure is reduced to 730 millimeters.
4. The volume and pressure of a gas are 850 milliliters and 70.0 mm respectively. Find the increase in pressure required to compress the gas to 720 milliliters.
5. Compute the volume of oxygen at STP if the volume of the gas is 450 milliliters when the temperature is 23 0C and the pressure is 730 milliliters.

Wesstykay on October 02, 2019:

This has made me to understand that gas is very essential this universe,that both plant and human cannot live the absence.

Arfin Morshed on September 23, 2018:

why the behaviour of gases is different from other materials?

Jeriemae DelaCruz on August 21, 2018:

Jeriemae Dela Cruz bsmt-1

When atoms gain or lose electrons to yield ions, or combine with other atoms to form molecules, their symbols are modified or combined to generate chemical formulas that appropriately represent these species.

Abe Puzon on August 21, 2018:

Krichelle Kae Enriquez, BSMT-1

As a med tech student learning about the theories of gases, gives a lot of knowledge. GAS helps humans to live on earth, the oxygen we breath makes our heart pumps, and the carbon dioxide helps the plants to grow. Gas is one of the states of matter, it also forms by small atoms. Thank you to this slides because its help a lot to learn new.

Abe Puzon on August 21, 2018:

Puzon, Abegail S. BSMT-1 This topic focuses on gases only and use the kinetic theory to explain their behavior.

trixie anne on August 21, 2018:

SILVESTRE, TRIXIE ANNE C. BSMT 1, this lesson and this slide helps me to understand very well what GAS is usually in our life. That It powers our homes and businesses with electricity. It heats and cools them, too. Natural gas fuels many of our municipal transportation fleets and the trucks that deliver goods to market. It provides the raw material needed to manufacture the goods we consume, and the fertilizer farmers use to grow the food we eat.

Tricia Anne Reyes BSMT from Palapala, San Ildefonso Bulacan on August 21, 2018:

Gas is one of the form of matter, with he help of this article i have learned that gases also have its properties such as it made up of molecules and the molecules of gases are randomly distributed. I've also learned different gas laws, that will help me to compute volume, pressure and temperature. As a medicine student i can also say that having a background about these certain topics is important since we're in a science field.

REYES, TRICIA ANNE I. BSMT1 on August 21, 2018:

Gas is one of the three forms of matter, with this article i have learned that there are different properties of gas and the most known is gas is made up of molecules. I've also learned Gas Laws which i can use to compute pressure, volume and temperature. As a medical technology student it is important to know this to have a deep background about gas law. That's why i can say that this article is very helpful for a student like me :)

Nhiza Mae Fajardo on August 21, 2018:

FAJARDO, NHIZA MAE A. BSMT-1

De Leon Melody Jane S. on August 21, 2018:

This presentation is a good material for us as a student to easily learned the topic of what it is all about. It is very informative article of what is the theories and behavior of gases is. A gases is one of the three forms of matter. This form of matter is differ in the way it fills up space and shape. Like other forms of matter, gases should be measure in volume, temperature, pressure and mass.

pascualangelou on August 21, 2018:

Pascual, Mary Angelou C. BSMT 1.

Gases is one the very important to us as living thing because it is one of our main source of living. In studying this we learned characteristics that the behavior of the gases that surrounds us and in this topic, we know all the related in application of the gases. This topic is very helpful to us to know more about gases.

Dungo, Joyce Nicole B. BSMT-1 on August 21, 2018:

Gas is one of the three forms of matter. And just like liquid, we could easily study the gases if we are knowledgeable enough on to measure the volume, how to measure the mass and how we could certainly measure the temperature that enable us to solve problems. The amount temperature, pressure, and volume of a gas are interdependent, and there are scientists that developed laws to describe the relationships among them. These laws are the Boyle's law, Charles' Law andGay-Lussac's Law.

Kimberly Reforsado on August 20, 2018:

Studying the theories and behavior of gases enables me to be familiar with the basic characteristics of gas and learn and understand the relationship of volume, temperature, pressure and mass when it comes to gas and how to used them in order to solve problems that involves this phase of matter. As a future medical technologist, the knowledge I gained through this lesson is useful because in our future profession, we will deal with different phases of matter and it includes gases.

Emman Payuran on August 20, 2018:

VILLASENOR, EMMANUEL P.

BSMT 1

Gas particles move very fast and collide with each other often and that is the reason why gases mix together easily. Their particles move in a rotational manner and the forces between them are so weak since they are far from each other. There are several gas laws too like Boyle's Law, Charle's, Combined gas and the ideal gas.

John Derrick Chan on August 20, 2018:

CHAN, JOHN DERRICK L. BSMT1 In this lesson, we tackled about the theory and behavior of gases. This lesson is significant because it is not only usable for a certain kind of gas but, all and our atmosphere is surrounded by different gases. Meaning, the gases occupying our atmosphere changes depending on the volume, temperature and pressure of the sample gas. As a medical technologist, we need to understand all types of matter since it can cause a deviation in the results anytime.

Elaine Herrera on August 20, 2018:

HERRERA, MARY ELAINE V. BSMT As we all know, gas is one of the three forms of matter. As a future medical technologist, this article was helpful to understand gases. This article helped me become familiarized with the basic characteristics of gases. It also helped me understand different theories related to the application of gases. This article was also helpful on educating on how to apply the relations of volume, temperature, pressure, and mass to solve problems on gases.

PatriciaMae Sayco on August 20, 2018:

SAYCO, PATRICIA MAE M. BSMT1. Become familiar in basic characteristic of gas is helpful for us to understand how can we apply the relationship of volume, temperature, pressure,and mass to solve problems on gases.

Jimelle Conson from Bulacan on August 20, 2018:

CONSON, JIMELLE - BSMT 1. Gas is considered as one of the forms or states of matter. It has no definite shape and volume. Without gas, we can't breathe. Which is one of the important thing that we need in this planet. Through this page, I am totally taught about gas' compositions.

Pinky Miranda on August 19, 2018:

Miranda, Ma. Pinky Ramei V. (BSMT1) - Gas is one of the forms of matter and it is defined as a matter with particles that doesn't have any definite shape and volume but occupies space and has mass. and scientists have made up several laws to solve problems about gas. And we can further understand the relation of gas in temperature, pressure and volume.

anjelacastro2 on August 19, 2018:

CASTRO, ANJELA V. (BSMT-1)- I have learned form this slides that there are several laws that explains different theories and behavior of gases. I got to also familiarize myself with the persons behind this theories which helps us, the students in understanding the lessons and to know more about this topic.

Allen Tuazon BSMT on August 19, 2018:

Tuazon, Allen Patrick F. (BSMT-1) - Gas is a form of matter that we need in our daily lives because without gas we can't breath and we will die eventually. Gas don't have a shape and it don't have a defined form. As a Med Tech student we should know how to manage and use different kind of gas in our field of study.

Chloe Bundalian on August 19, 2018:

Bundalian, Chloe Jane L. BSMT1- Gas is one of the three forms of matter. There are several laws that explain appropriately how the pressure, temperature, volume and the number of particles in the container of gas are related.

Darah Arthria Cristobal from San Ildefonso, Bulacan on August 17, 2018:

CRISTOBAL, DARAH ARTHRIA DC. BSMT-1 A gas is defined as a state of matter consisting of particles that have neither a defined volume nor defined shape. It is one of the four fundamental states of matter, along with solids, liquids, and plasma. Gas laws has Boyle's Law, Charle's Law, Gay-lussac's Law and Combined gas law. Gas laws helps us to determine the initial temp and final temp, initial volume and final volume, initial pressure and initial pressure.

KristineCassandra on August 16, 2018:

Jota, Kristine Cassandra B.

BSMT 1

Gases are very important to us and to other living things, without gases we'll not be able to live, an example of gas are, Oxygen, Carbon, Nitrogen and hydrogen that we are using everyday. Gases may be invisible or cannot be seen by our eyes but ut us important to human beings.

Krichelle kae Calderon Enriquez from San Miguel, Bulacan, Philippines on August 16, 2018:

AS a med tech student learning about the theories of gases, gives a lot of knowledge. GAS helps humans to live on earth, the oxygen we breath makes our heart pumps, and the carbon dioxide helps the plants to grow. Gas is one of the states of matter, it also forms by small atoms. Thank you to this slides because its help a lot to learn new.

Ma. Roselle Angela S. de Leon - BSMT 1 on August 11, 2018:

Gas is one of the three forms of matter. Every known substance is either a solid, liquid or a gas. These forms differ in the way they fill space and change shape. A gas, such as air has neither a fixed shape nor a fixed volume and has weight. The molecules of gases are randomly distributed and are far apart. Gases can be easily compressed, the molecules can be forced to be closed together resulting to lesser space between them. The volume or space occupied by the molecules themselves is negligible as compared to the total volume of the container so that the volume of the container can be taken as the volume of the gas.

CALAGUE KATHLENE JADE BSMT 1 on August 05, 2018:

The gases are very important to human beings. Because without these, earth would be lifeless. Carbon dioxide and Oxygen are the most important gases for living organisms. With these gases, humans are able to sustain life by breathing, plants use carbon dioxide and water to convert it into energy in order to supply foods for humans.

Pauline Venzon on August 04, 2018:

Venzon, Pauline Charm S. (BSMT-1)

Being Medtech students gases is very important to know , because gases is useful . Gas is one of the four fumdamental states of matter . It's important to have gas in our everyday living .

Pauline Charm Venzon on August 04, 2018:

venzon pauline charm s. (BMTS-1)

Being Medtech student gases is very important to know , because gases is useful even in our kitchen . Gas is one of the four fumdamental states of matter. its important to have gas in our everyday living .

mariel roque on March 27, 2018:

Thank you for sharing your lesson,how you prepare and present it help me make a module for my learners. God bless....

Teddy Gullem on September 25, 2017:

The Behavior of gases is explained by what scientists call the Kinetic Molecular Theory.The Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. Kinetic Molecular Theory can be used to explain both Charles' and Boyle's Laws. The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only~ Boyle's Law

Pauline Louise Toribio from Baliuag, Bulacan on September 21, 2017:

TORIBIO, PAULINE LOUISE A.

BSN I

Gas is a form of matter which can be easily conpressed and has lower density than solid and liquid. Gas such as oxygen is essential to life that's why it is important to know about gases. This topic explains different gas laws, they explained how pressure, temperature and volume is related to each other.

Camille San Mateo on September 21, 2017:

SAN MATEO, CAMILLE C.

BSN-1

Gases are invisible but play a visible role in our everyday lives. It has neither fixed shape nor a fixed volume. Most of the gases exist as molecular and randomly distributed and are far apart according to kinetic molecular theory. All matter is made of constant moving atoms or molecules because of their mass and velocity they possess kinetic energy.

Gil Joseph R. Calderon on September 06, 2017:

Gases have the lowest density of the three matter, are highly compressible, and fill their containers completely.

There are several Gas laws includes Boyle’s Law, Gay Lussac’s, Combined Gas Law, Idea Gas law, Graham’s Law of diffusion.

Kinetic molecular theory is based on the following postulates, or assumptions. Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion. These particles move in a straight line until they collide with another particle or the walls of the container. These particles are much smaller than the distance between particles. Most of the volume of a gas is therefore empty space. There is no force of attraction between gas particles or between the particles and the walls of the container. Collisions between gas particles or collisions with the walls of the container are perfectly elastic. None of the energy of a gas particle is lost when it collides with another particle or with the walls of the container. The average kinetic energy of a collection of gas particles depends on the temperature of the gas and nothing else.

Dave Joshua Villangca on September 06, 2017:

VILLANGCA, DAVE JOSHUA B.

BSN-I

Gas is one of the three forms of matter. It doesn't have a fixed shape, a fixed volume and has mass. The molecules of gases are randomly distributed and are far apart. Gases have lower densities than solid and liquids. The Measureable Properties of Gases are Pressure, volume, temperature, Amount of Gas, and Density.

The behavior of gases is explained through Kinetic Molecular Theory which means that all matter is made up of constantly moving atoms or molecules. The formula for Kinetic Energy is K.E= 1/2mv. The different Gas laws involved Boyle's Law, Charle's Law, Gay-Lussac's Law, Combined Gas Law, Ideal Gas Law, and Graham's Law of Diffusion.

Gas, in the form of oxygen, is the most important gas in the human body. When the oxygen in our body decreases, we could get Hypoxemia which is a dangerous condition. Without oxygen, our brain, heart, lungs, and other organs will not function well and can lead us to death.

Bianca Bernardo on September 05, 2017:

The kinetic theory of gases is a topic that can explain many everyday observations. The kinetic theory of gases (also known as kinetic-molecular theory) is a law that explains the behavior of a hypothetical ideal gas. According to this theory, gases are made up of tiny particles in random, straight line motion. They move rapidly and continuously and make collisions with each other and the walls. This was the first theory to describe gas pressure in terms of collisions with the walls of the container, rather than from static forces that push the molecules apart. Kinetic theory also explains how the different sizes of the particles in a gas can give them different, individual speeds.

Different Gas Laws include Boyle's Law, Charle's Law, Pressures Law, Avogadro and Graham's Law

RUSSELL BERNARDINO BSTM4 on September 05, 2017:

For a given gas, the specification of only two properties—usually chosen to be temperature and density or temperature and pressure—fixes all the others. Thus, if the temperature and density of carbon dioxide are specified, the gas can have only one possible pressure, one internal energy, one viscosity, and so on. In order to determine the values of these other properties, they must either be measured or calculated from the known properties of the molecules themselves. Such calculations are the ultimate goal of statistical mechanics and kinetic theory, and dilute gases constitute the case for which the most progress toward that goal has been made.

Compared to the numbers of molecules involved, there are only a few properties of gases that warrant attention here, namely, pressure, density, temperature, internal energy, viscosity, heat conductivity, and diffusivity.

Christian Paul V. Ogorida BSCE on September 05, 2017:

Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image. One type of commonly known gas is steam.

The gaseous state of matter is found between the liquid and plasma states,[1] the latter of which provides the upper temperature boundary for gases. Bounding the lower end of the temperature scale lie degenerative quantum gases[2] which are gaining increasing attention.[3] High-density atomic gases super cooled to incredibly low temperatures are classified by their statistical behavior as either a Bose gas or a Fermi gas. For a comprehensive listing of these exotic states of matter see list of states of matter.

Jenica M. De Leon on February 26, 2017:

De Leon, Jenica M. BSPSY-2 Gases unlike from what we have learned in solids and liquids doesnt have a definite shape and volume. The particles of gas move very fast and they collide with each other often thats why they mix together easily. Their particles move in a rotational manner and the forces between them are so weak since they are far from each other. Gases have several laws that we can learn from this article. There's what we call the Boyle's Law, Charles's..the combined gas law of the two, Gay-Lusaac's and the ideal gas that explains more about how interesting it can be to study gaseous state.

Jenica De Leon on February 26, 2017:

De Leon, Jenica M. BSPSY-2 Gas as we all know does not have a definite shape and volume unlike the solid and liquid. Gas particles move very fast and collide with each other often and that is the reason why gases mix together easily. Their particles move in a rotational manner and the forces between them are so weak since they are far from each other. There are several gas laws too like Boyle's Law, Charle's, Combined gas and the ideal gas.

rkyled on February 26, 2017:

REYMART KYLE D. DABBAY

BS PSY II

gases are (relatively) easy to study. We could fill up a balloon or a bladder (including a Montgolfier balloon); we could measure the volume; we could (sometimes) measure the mass; we could certainly measure the temperature. Early chemists and physicists found that by studying three macroscopic variables, temperature, pressure, and volume, (all of which are measurable!) that a kinetic molecular theory of gases could be developed. This was based on experiment and not on intuition. Using these experimental discoveries, chemists and physicists could develop a pretty shrewd picture of what molecules were, and how they behaved.

Denise arceo on February 25, 2017:

Denise arceo

BAC II

Gas is one of the states of matter. It's molecules occupy space as liquid can occupy space of any shape.

It is relatable to communication because whenever we travel to our designated location where we scout for stories that are relevant to the local population we use gas to fuel our car.

jerson maniego BSHM-4 on February 25, 2017:

gas is very important to us human for it is the most important thing (oxygen) that keeps us alive. in Hm it plays many roles it can be used to produce flame for heating meals. so it is important to understand gas

Sean Rick Ledesma BAC-II on February 25, 2017:

Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.

Luisito Dimagiba III on February 25, 2017:

BSHM

A substance possessing perfect molecular mobility and the property of indefinite expansion as opposed to a solid or liquid. The state of matter distinguished from the solid and liquid states by relatively low density and viscosity, relatively great expansion and contraction with changes in pressure and temperature, the ability to diffuse readily, and the spontaneous tendency to become distributed uniformly throughout any container.

Rafael Adriano on February 24, 2017:

Gas particles move in random, straight-line motion. Gas particles possess a greater kinetic energy than the particles of a liquid or solid. The greater kinetic energy is due to gases existing at higher temperatures than liquids or solids. As temperature increases, particles move faster and, thus, have greater kinetic energy. The particles of a gas have minimal interactions, except collisions with each other.

Maniella de Leon on February 24, 2017:

Properties of gases can be modeled using some relatively simple equations, which we can relate to the behavior of individual gas molecules. There are four laws; Avogadro's law, Charle's law, Gay Lussac's law and Boyle's law.

In relation with teaching profession, we shall make rules or laws in our classroom for much easier classroom management and it will surely help the development of the students.

Maniella Assumpta M. De Leon BEED II on February 24, 2017:

Properties of gases can be modeled using some relatively simle equations, which we can relate to the behavior of individual gas molecules. There are four laws namely, Charle's Law, Boyles Law, Gay Lussac's law and Avogadro's law.

In relation with teaching profession, we shall make rules or laws in our classroom for much easier management of the classroom and it will surely help student's development.

Mary Grace Gonzales on February 24, 2017:

BU BSTM 4 Sci 202

Postulates of the Kinetic Molecular Theory. The behavior of gases is explained by what scientists call the Kinetic Molecular Theory. According to this theory, all matter is made of constantly moving atoms or molecules. ... The average kinetic energy of the molecule is directly proportional to the absolute temperature.

Jahzeel Santos on February 24, 2017:

Jahzeel DR. Santos BS PSY II The theory that describes a gas as a large number of submicroscopic particles (atoms or molecules), all of which are in constant rapid motion that has randomness arising from their many collisions with each other and with the walls of the container. It assumes that the molecules are very small relative to the distance between molecules. The molecules are in constant, random motion and frequently collide with each other and with the walls of any container. Gases behave differently than solids or liquids do. For example, the volume of a gas can change due to pressure, but the volume of a solid or liquid generally cannot. The gas laws describe how variables such as pressure, volume, and temperature affect the behavior of gases.

mariseperez08 on February 24, 2017:

Perez, Nina Marise V.

BEED-II

(TF/ 12:30-2:00pm CAS 105)

One of the most amazing things about gases is that, despite wide differences in chemical properties, all the gases more or less obey the gas laws. The gas laws deal with how gases behave with respect to pressure, volume, temperature, and amount. Gases are the only state of matter that can be compressed very tightly or expanded to fill a very large space. Pressure is force per unit area, calculated by dividing the force by the area on which the force acts. The earth's gravity acts on air molecules to create a force, that of the air pushing on the earth. This is called atmospheric pressure. The units of pressure that are used are pascal (Pa), standard atmosphere (atm), and torr. 1 atm is the average pressure at sea level. It is normally used as a standard unit of pressure. The SI unit though, is the pascal. 101,325 pascals equals 1 atm. For laboratory work the atmosphere is very large. A more convient unit is the torr. 760 torr equals 1 atm. A torr is the same unit as the mmHg (millimeter of mercury). It is the pressure that is needed to raise a tube of mercury 1 millimeter. There are also 4 laws, Charle's Law, Boyle's Law, Gay Lussac's Law and Avogardo's Law.

Elize Bantang 14 on February 24, 2017:

Eliza B. Merle

BEEd-ll

Gas is one of the three forms of matter. Every known substance is either a solid, liquid or a gas. These forms differ in the way they fill space and change shape. A gas, such as air has neither a fixed shape nor a fixed volume and has weight. Measurable Properties of Gases are Property, Symbol, Common Units. And it has laws, Boyle's Law, Charle's law and Gay-Lussac’s Law. Having connection in teaching, students are so diverse, they have their own principles, beliefs and ideas in life. We have to respect each one of them.

Maria Luz Mendoza on February 24, 2017:

MA. LUZ MENDOZA BEED-II

The word gas comes from gaos, a Dutch form of the word chaos. Gases were the last substances to be understood chemically. Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. The particles move very fast and collide into one another, causing them to diffuse, or spread out, until they are evenly distributed throughout the volume of the container. In many areas, gases are an indispensable part of our lives. Gases are often already used during production in this way. Typical applications are the freezing and packaging of vegetables and meat, the preparation of the dough for various baked goods, the ripening of bananas or the stabilization of thin-walled beverages cans. Other possible applications for gases in the food industry include the controlled cooling and energization of sausage products, the blending of pourable bulk foodstuffs, the conversion of liquid products or pastes into free-flowing powders, and the maintenance of a seamless cold chain for fresh and frozen products.

Jahzeel DR. Santos BS PSY II on February 23, 2017:

The theory that describes a gas as a large number of submicroscopic particles (atoms or molecules), all of which are in constant rapid motion that has randomness arising from their many collisions with each other and with the walls of the container. It assumes that the molecules are very small relative to the distance between molecules. The molecules are in constant, random motion and frequently collide with each other and with the walls of any container. Gases behave differently than solids or liquids do. For example, the volume of a gas can change due to pressure, but the volume of a solid or liquid generally cannot. The gas laws describe how variables such as pressure, volume, and temperature affect the behavior of gases.

Kamille Fernando on February 23, 2017:

IVY KAMILLE FERNANDO BS PSYCHOLOGY II

A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container. Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form. Boyle's Law is an ideal gas law where at constant temperature. Charles's law states that the volume of a given mass of an ideal gas is directly proportional to its temperature on the absolute temperature scale (in Kelvin) if pressure and the amount of gas remain constant. Gay-Lussac's Law shows the relationship between the temperature and pressure of a gas. Combined gas law states that the pressure is inversely proportional to volume, or higher volume equals lower pressure. Pressure is directly proportional to temperature, or higher temperature equals higher pressure. An ideal gas is defined as one in which all collisions between atoms or molecules are perfectly eleastic and in which there are no intermolecular attractive forces.

JosephineLopez04 on February 23, 2017:

Josephine V. Lopez / BEED - II

The gas laws were developed at the end of the 18th century, when scientists began to realize that relationships between the pressure, volume and temperature of a sample of gas could be obtained which would hold to a good approximation for all gases. Gases behave in a similar way over a wide variety of conditions because they all have molecules which are widely spaced, and the equation of state for an ideal gas is derived from kinetic theory. The earlier gas laws are now considered as special cases of the ideal gas equation, with one or more of the variables held constant. In 1662 Robert Boyle studied the relationship between the volume and pressure of a gas at constant temperature. Charles's Law, or the law of volumes, was found in 1787 by Jacques Charles. It states that, for a given mass of an ideal gas at constant pressure, the volume is directly proportional to its absolute temperature, assuming in a closed system. Gay-Lussac's Law, Amontons' Law or the Pressure Law, was found by Joseph Louis Gay-Lussac in 1809. It states that, for a given mass and constant volume of an ideal gas, the pressure exerted on the sides of its container is directly proportional to its absolute temperature. Avogadro's Law states that the volume occupied by an ideal gas is directly proportional to the number of molecules of the gas present in the container.

CHRISTIAN ANTHONY R VALINO BSPSY II on February 23, 2017:

Gases are the only state of matter that can be compressed very tightly or expanded to fill a very large space. The gas laws are not a set of government regulations concerning use of heating fuel; rather, they are a series of statements concerning the behavior of gases in response to changes in temperature, pressure, and volume. It is very important for us to know how gases behave not just for education perse but for our safety reasons too.

Elaiza Medina on February 23, 2017:

Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image. One type of commonly known gas is steam.

Amira Ismail on February 23, 2017:

Amira Ismail

GENERAL CHEMISTRY

BAC-II

The theories and behavior of gases brings together gas

properties. Can be derived from experiment and theory. Relating this to our course which is Mass Communication we bring it together as well to our jobs within building a production or industry that we are in.

Villaroman, Nikki D.C. BEEd III on February 23, 2017:

Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. The particles move very fast and collide into one another, causing them to diffuse, or spread out, until they are evenly distributed throughout the volume of the container.

When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. The particles exert more force on the interior volume of the container. This force is called pressure. There are several units used to express pressure. Some of the most common are atmospheres (atm), pounds per square inch (psi), millimeters of mercury (mmHg) and pascals (Pa). The units relate to one another this way: 1 atm = 14.7 psi = 760 mmHg = 101.3 kPa (1,000 pascals).

Besides pressure, denoted in equations as P, gases have other measurable properties: temperature (T), volume (V) and number of particles, which is expressed in a mole number (n or mol). In work involving gas temperature, the Kelvin scale is often used.

Gas is part of our daily lives. As a future educator, teaching gas to learners would make them knowledgeable about what types of gas are harmful and useful to them.

Maryn Pineda on February 23, 2017:

MARY NOELLE PINEDA BAC-II GENERAL CHEMISTRY TF 7:30-12:00 I have learned from reading the slides that gas is one of the three forms of matter and that most gases exist as molecules, they are randomly distributed and are far apart, they have molecular mass and that one of its behavior is they are made of constantly moving atoms or molecules. This lesson is important and appropriate for my course for information dissemination because we became familiar with the basic characteristics of gases and we've understand the postulates of the kinetic molecular theory as applied to gases. And of course, the gas laws.

Aldrin L Santiago on February 22, 2017:

Aldrin L Santiago BS PSY II Gases behave differently than solids or liquids do. For example, the volume of a gas can change due to pressure, but the volume of a solid or liquid generally cannot. The gas laws describe how variables such as pressure, volume, and temperature affect the behavior of gases. As a psychology student, it can be useful in my future field.

Zipagan on February 22, 2017:

Dhaina Marie B. Zipagan (BAC-II)

Gas is one of the three forms of matter. A gas is a state of matter with no defined shape or volume. Gases have their own unique behavior depending on a variety of variables, such as temperature, pressure and volume.

Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.

There are 5 measurable properties of gases: Pressure (P) torr, mm Hg, cm Hg, atm; Volume (V) ml, i, cm, m; Temperature (T) K; Amount of gas (n) mol; Density (d) g/l

There are different gas laws that explain the relation on how the pressure, temperature, volume and the number of particles in the container of gas.

Boyle's Law states that at a given temperature, the volume occupied by a gas is inversely proportional to the pressure. Charles' Law states that at a given pressure, the volume occupied by a gas is directly proportional to the absolute temperature of the gas. Gay-Lussac’s Law states that the pressure of a certain mass of gas is directly proportional to its absolute temperature at constant volume. The Combined Gas Law (Combination of Boyle’s Law and Charle’s Law) states that the volume of a certain mass of gas is inversely proportional to its pressure and directly proportional to its absolute temperature.

As a mass communication student, we should not just disseminate information but correct information that’s why it is important that we should have knowledge about this.

Nik Miranda on February 22, 2017:

MIRANDA, NIXIELINE

BAC II

Gas is present everywhere but we cannot be seen by our naked eye because it has no fixed shape, has no color and has weight. A gas mixture would contain a variety of pure gases much like the air. We cannot live without gases. We have always had greenhouse gases in our atmosphere. Without them the Earth would be too cold for us, or any other living thing, to survive.

Jannilene Tubon BAC II on February 22, 2017:

Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image. One type of commonly known gas is steam.

Salvador, Jucel Roma M. on February 22, 2017:

BEED-II

TF/ 12:30-2:00/ CAS 105

Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. Kinetic Molecular Theory can be used to explain both Charles' and Boyle's Laws. The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only. Combining Charles's Law, Boyle's Law, and Gay-Lussac's Law gives us the combined gas law. For a gas with constant molar mass, the three other state variables are interrelated. The Combined Gas Law can be used for comparisons between gases. As a future teacher, we should abide with the laws and principles in the teaching-learning process. We should apply all these laws and principles to make our teaching effective and for our students to be guided and for them to understand the lesson well.

Cristina Perez on February 22, 2017:

Perez, Ma. Cristina M.

BEED-II

TF/ 12:30-2:00/ CAS 105

The gas laws are not a set of government regulations concerning use of heating fuel; rather, they are a series of statements concerning the behavior of gases in response to changes in temperature, pressure, and volume. These were derived, beginning with Boyle's law, during the seventeenth, eighteenth, and nineteenth centuries by scientists whose work is commemorated through the association of their names with the laws they discovered.

There are also 4 four laws namely: Charle's Law, Boyle's Law, Gay Lussac's Law and Avogardo's Law.

We can connect this to teaching for us being teachers should have different laws and principles inside the classroom. A one law is not suitable for all. Therefore, we should think of different laws and strategies that will greatly help students in learning.

Naomi de Guzman on February 22, 2017:

Naomi de Guzman BS PSY II

Gases are made up of particles with no defined volume but with a defined mass. In other words their volume is miniscule compared to the distance between themselves and other molecules.

Gas particles undergo no intermolecular attractions or repulsions. This assumption implies that the particles possess no potential energy and thus their total energy is simply equal to their kinetic energies.

Gas particles are in continuous, random motion.

Collisions between gas particles are completely elastic. In other words, there is no net loss or gain of kinetic energy when particles collide.

The average kinetic energy is the same for all gases at a given temperature, regardless of the identity of the gas. Furthermore, this kinetic energy is proportional to the absolute temperature of the gas.

Carmela Perez on February 22, 2017:

Perez, Ma. Carmela M.

BEED-II

(TF/ 12:30-2:00/ CAS 105)

Gases were among the first substances studied using the modern scientific method, which was developed in the 1600s. It did not take long to recognize that gases all shared certain physical behaviors, suggesting that gases could be described by one all-encompassing theory. The kinetic molecular theory of gases is a model that helps us understand the physical properties of gases at the molecular level. Gases are the only state of matter that can be compressed very tightly or expanded to fill a very large space. Pressure is force per unit area, calculated by dividing the force by the area on which the force acts. The earth's gravity acts on air molecules to create a force, that of the air pushing on the earth. There are four laws: The Boyle's Law, Charle's Law, Avogardo's Law, and Gay Lussaca's Law.

These laws can be connected to teaching in which we have different laws and methods or strategies to which our students can understand the lesson. We have a variety of methods to attain our lesson's objectives and to meet all the needs of our students.

Samantha Aiva Mareey Rayco - BS PSYCHOLOGY II (GenChem) on February 22, 2017:

Gas as we all know is one of the three forms of matter, with solid and liquid. Gases are forms of matter that can be easily cpompressed. Gases can be measured in pressure, volume, densit and temperature and to prove that there is a link between this properties, scientists formed several gas laws to explain the relationship between these properties.

Karen Manalac, BAC IV 7:30-12:00 TF on February 22, 2017:

Gas as we all know if one of the four fundamental states of matter. Yes, gas is important because we use it in so many different aspects. As a communication arts student, I can say that this is relevant to our course by stating that we need to spread not only just information but correct information to people.

Mallorie San Miguel on February 22, 2017:

Mallorie SAn Miguel BS PSY II

Temperature, pressure, amount and volume of a gas are interdependent, and many scientists have developed laws to describe the relationships among them.

Frances Birco on February 22, 2017:

Frances Birco (BAC-II)

Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. In relation with Mass Communication, gas is very important because it is one of the factors we use in giving information.

AZ08 on February 21, 2017:

Eimeren Grace DC. Soriaga (BS-PsyII)

The early gas laws were developed at the end of the eighteenth century, when scientists began to realize that relationships between the pressure, volume and temperature of a sample of gas could be obtained which would hold for all gases. Gases behave in a similar way over a wide variety of conditions because to a good approximation they all have molecules which are widely spaced, and nowadays the equation of state for an ideal gas is derived from kinetic theory. The earlier gas laws are now considered as special cases of the ideal gas equation, with one or more of the variables held constant. Gas or Air very important to all living things nothing knowing the theory behind them can help us improve our understanding of live more.

Vivianjane Mempin on February 20, 2017:

Vivian Jane M. Mempin

BAC-II

General Chemistry

Gas is one of three states of matter. It is distinct from solid and liquid since it has no fixed shape and no fixed volume. Unlike solids which has tightly-compressed particles, and unlike liquids with slightly moving particles, gases has particles which could move in any direction and those particles are randomly distributed and far apart.

There are 5 measurable properties of gases such as pressure (atm, torr), temperature (Kelvin), volume (mL, L), number of particles (mol) and density (g/mol). And the relations of each property from one another are explained by the different gas laws.

Boyle's Law says that Volume of gas is inversely proportional to its pressure. Charles' Law states that the volume of a gas is directly proportional to its temperature. Gay Lussac's Law explains that the pressure of a gas is directly proportional to its temperature. While Combined Gas Law states that the volume of a gas is inversely proportional to its pressure and directly proportional to its temperature.

In communication, we aim not only to disseminate information in oral or written form. That's why knowing this is important for us, BAC students.

April Cayetano on February 20, 2017:

Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. The particles move very fast and collide into one another, causing them to diffuse, or spread out, until they are evenly distributed throughout the volume of the container.

When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. The particles exert more force on the interior volume of the container. This force is called pressure.

PATRICIA ANN T. CRUZ on February 19, 2017:

A substance such oxygen and hydrogen that is like air like no fixed shape. All matter is made of constantly moving atoms pr molecules. The molecules collided with one another and with the sides of containers

AIA KARREL PUNZALAN BS PSY II on February 17, 2017:

Since the days of Aristotle, all substances have been classified into one of three physical states. A substance having a fixed volume and shape is a solid. A substance, which has a fixed volume but not a fixed shape, is a liquid; liquids assume the shape of their container but do not necessarily fill it. A substance having neither a fixed shape nor a fixed volume is a gas; gases assume both the shape and the volume of their container. The structures of gases, and their behavior, are simpler than the structures and behavior of the two condensed phases, the solids and the liquids.

AIA KARREL PUNZALAN BS PSY II on February 17, 2017:

Look around the classroom. Everything, from the clothes you are wearing to the air you breath is matter.Matter is very important. Matter makes up everything including living things like plants and people. It also makes non-living things such as tables and chairs. Things as big as an elephant or as tiny as a grain of sand on a beach are matter. Everything is matter and matter comes in three different states: solid, liquid and gas. That means that everything is either a solid, a liquid, or a gas. Each state has properties.

Chella P. Maniquiz TF-7:30-12:00 BSTM on February 04, 2017:

In studying the behavior of gas, gas is one of the four fundamental states of matter, A pure gas may be made up of individual atoms. Gas mixture would contain a variety of pure gases much like the air, therefor gas are part of our daily life so we must know the different behavior and theories of it.

In the field of Tourism Industry, Gases are very important because without it many equipments may not work properly..

Paolo Evangelista on August 08, 2015:

Any gas is composed of a very large number of very tiny particles called molecules.The molecules are very far apart compared to their sizes, so that they can be considered as points The molecules exert no forces on one another except during rare collisions, and these collisions are perfectly elastic,they take place within a negligible span of time and in accordance with the laws of mechanics.

Cess Capulong on March 17, 2015:

Gases are made up of particles with no defined volume but with a defined mass. In other words their volume is minuscule compared to the distance between themselves and other molecules.

Jole Ymenel Tila from Pulilan, Bulacan on March 09, 2015:

Tila Jole Ymenel F. BUHM

A pure gas may be made up of individual atoms elemental molecules made from one type of atom or compound molecules made from a variety of atoms . A gas mixture would contain a variety of pure gases much like the air.

Paulo Tomas on March 08, 2015:

TOMAS J P BUHM

Gas is everywhere, we may also see this by our naked eyes and i think that is the best reason why it is related to our chosen fields, it is for us to be aware of what we see and what we feel by our sense of touch.

Monic dela Cruz Sarmiento from San Miguel, Bulacan on March 08, 2015:

31Sarmiento, MDC BUHM

Gas is one of the basic forms off matter. Its relevance to our field is that wherever we go, whatever we do, whoever we serve, gas is just everywhere. We all know that oxygen is one of the important gas we need, not only in our fieldd but also in our everyday life to survive. In preparing food, gas plays an important role. Without it, we will not be able to prepare foods for our dear costumers. Another thing, we also use gas in vehicles we use to go on our work. Without gas, there will be no Hospitality Industry that functions well.

Fatima Cruz Castro on March 05, 2015:

7 CASTRO F C BUTM 2014

As a tourism student we should know about classifications or any types of gases. and it includes all about oxygen and anything. that's why we should know this and i know it will be so useful someday.

Zyrine Mae Taruc on March 05, 2015:

Taruc, ZM BUTM 2014

The speed of gas particles is related to their absolute temperature. In other words, as their temperature increases, their speed increases, and finally their total energy increases as well. However, it is impossible to define the speed of any one gas particle.

Estacio M O BUTM on March 05, 2015:

Gas is important to know especially because it is one of the three basic forms of matter, composed of molecules in constant random motion. Unlike a solid, a gas has no fixed shape and will take on the shape of the space available. Unlike a liquid, it has no fixed volume and will expand to fill the space available.We can use gas everywhere especially in traveling and cooking.

Rad Mesina from Calumpit, Bulacan on March 05, 2015:

23 MESINA, DJ BUHM

oxygen keep our life nitrogen & co2 keep the plants and we have our food we can't live without cooking gas. No vehicle will move without it.

Clarenz Maximo on March 05, 2015:

21 MAXIMO, CR BUTM

All gases are made up of very tiny particles called molecules, which are widely separated from one another in an otherwise empty space. The gas are moved at a high speed and traveling in a straight line but in random direction.

Phoebe Sp on March 05, 2015:

Gases can evaporate or soliditate. Gases is one of the most important property of matter because it is very essential and common in the human body. Our body is composed of water with gases. Our environment needs gas and so does us. Our environment is composed of gases and it is one of the main sources of life. This is why gases is very important to us.

28,QUIZON,CA BUTM on March 05, 2015:

As a tourism student.Gas is very important in our field,It is helpful because we can identify the temperature of a certain place and other properties of gases like the relations of volume, pressure, and mass.

28Quizon,CA BUTM on March 05, 2015:

Gases is very important in the field of Tourism. It is invisible but it plays a very important role in our life. without gases we cannot live. Gas use for transportation and in our course it is very important because in the airline we need it to send the tourist to his/her destination.

Jonna Mae Book on March 05, 2015:

BOOK, JM BUTM 2014

A pure gas may be made up of individual atoms (e.g. a noble gas or atomic gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air.

Elli Rose Gabriel on March 05, 2015:

1 BALELA, E.G BUTM 2014

as a tourism students gas is very important because whatever we do we need gas. like for travelling for cooking and etc.

aside from that we have to know the uses of different gases for ours to be safe.

27 PARUNGAO, GT BUTM on March 05, 2015:

Gases are made up of particles with no defined volume but with a defined mass. In other words their volume is minuscule compared to the distance between themselves and other molecules. A gas is one of the different phases of matter. Similar to liquids and plasmas, gases are fluids.

Melanie Samson on March 05, 2015:

SAMSON, MH BUTM 2014-2015

Gas is everywhere, we may also see this by our naked eyes and I think that is the best reason why it is related to our chosen fields, it is for us to be aware of what we see and what we feel by our sense of touch.

Marife DG. Montejo on March 05, 2015:

Gases are very important, it has a lot of uses, without it we cannot do our daily activities and in our field we really need gases for traveling and cooking to satisfied our guests.

Capanas MJ BUHM on March 05, 2015:

Capanas MJ BUHM

Gas is one of the four fumdamental states of matter. It's important to have gas in our everyday living.

marjorie Lansangan BSHM on March 04, 2015:

for me Gases are invisible but they play in everyday things a visible role. and it is important to us , in our life without oxygen or Gas we canno't live in this world Gas is so very needed specially in our course of Hospitality Management on how to cooking foods . so everything is really relevance.