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The Theories and Behavior of Gas

Updated on October 05, 2016
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 weig
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 weig

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 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 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 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.
    • Gases have lower densities than solids and liquids.
    • The attractive forces between molecules (intermolecular) are negligible.

3. Most substances that are gaseous at normal conditions have low molecular mass.

Measurable Properties of Gases

Property
Symbol
Common 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 inspite of the transfer of energy from one molecule to another. At any given instant, the molecule do 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.

Kinetic Molecular Theory
Kinetic Molecular Theory

Gas Laws

There are several laws that explain appropriately 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 = 135 ml

Boyle's Law states that at a given temperature, the volume  occupied by a gas is inversely proportional to the pressure.
Boyle's Law states that at a given temperature, the volume occupied by a gas is inversely proportional to the pressure.

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

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 = ? T1 = 10 + 273 = 318 0K

V2 = 150 ml x 318 0K/2980K

V2 = 160 ml

Charles'  Law states that at a given pressure, the volume occupied by a gas is directly proportional to the absolute   temperature of the gas.
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

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

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 = 113.2 atm

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

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 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

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.
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.

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 has 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 in the laboratory, molecules of real gases are so small, weigh so little, and are so widely separated by empty space, 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 results obtained from them are really close approximations.

Ideal Gas Law
Ideal Gas Law

Graham's Law of Diffusion

In 1881, Thomas Graham, a Scottish scientist discovered the 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.

Gases

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    • 15 Gaba PJDP BUHM14 23 months ago

      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 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. 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.The only chemical elements which are stable multi atom homonuclear molecules at standard temperature and pressure (STP), are hydrogen (H2), nitrogen (N2) and oxygen (O2); plus two halogens, fluorine (F2) and chlorine (Cl2). These gases, when grouped together with the monatomic noble gases; which are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn) ; are called "elemental gases". Alternatively they are sometimes known as "molecular gases" to distinguish them from molecules that are also chemical compounds.

    • Iana Kristine profile image

      Iana kristine leoni 23 months ago

      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.

      LEONI IK, BUTM

    • johncarl ballents profile image

      johncarl ballents 23 months ago from San Rafael, Bulacan

      Gas is very Important in hm Student Because in preparing a food We use Pressure, Temperature, volume and It also help us to Cook the Food

      HM johncarlballentes

    • Harri Nagalinngam profile image

      Harri Nagalinngam 23 months ago from Manchester, United Kingdom

      Gas is very important in the Hospitality industry especially in cooking because we should know how much gas is needed to achieve the proper temperature of the flame when cooking or reheating.

    • Kyla Mae Navarro profile image

      Kyla Mae Navarro 23 months ago

      24KDG, NAVARRO BUTM2014

      Gases are the only state of matter that can be compressed very tightly or expanded to fill a very large space. Gases have their own unique behavior depending on the variety of variables, such as temperature, pressure and volume. A natural gas is a major source of electricity. It can replace dirty coal as an energy source.

    • Joshua Lim Calma profile image

      Joshua Lim Calma 23 months ago from San Miguel Bulacan

      CALMA JOSHUA LOM

      The gas consists of very small particles known as molecules. This smallness of their size is such that the total volume of the individual gas molecules added up is negligible compared to the volume of the smallest open ball containing all the molecules. This is equivalent to stating that the average distance separating the gas particles is large compared to thei

    • DelosSantosElaine profile image

      elaine delos santos 23 months ago from san luis,pampanga

      16 Delos Santos, ES BUHM

      Gas is one of the three forms of matter. Compared to solid and liquid, gases have lower densities. Kenetic Molecular Theory explain the behavior of gases which states that all matter is composed of constantly moving atoms. Gases are part of our daily life so we must know the different behavior and theories of it.

    • Clarisse Silverio profile image

      Clarisse Silverio 23 months ago

      26, Silverio, A C G. BUHM14

      Gas is one of the three forms of matter (solid, liquid and lastly gas) .

      Gas can be a pure gas which is made up individual atom such as noble gases, atomic gas like neon.

    • LOUISE JEROME CRU profile image

      Louise Jerome P. Cruz 23 months ago

      09 Cruz,L.J.,P. BU HM 14

      For me as a Hospitality Management Student it is important for us to know more about Gases like the different theories and its behavior. For example: Some of us will be working in Housekeeping department and their primary goal is to keep the hotels clean and free from unnecessary smell. So to prevent that, housekeepers usually puts air fresheners or they spray Glade or even Lysol to prevent that bad smell. Because those kind of cleaning agent it spreads easily and diffusion happens like in Gases it is just around us and easily spread around the area. Also in Food & Beverage department, We can easily determine whether the food we cook is over because the smell of it spreads easily. Also in cooking we are using different kinds of gases some other use methane gas, butane gas, LPG and etc. Gases are big part of the Hospitality Industry.....

    • Kat Canoza profile image

      4CanozaKTBUHM 23 months ago

      04 Canoza, KT BUHM

      The relevance of Gases in our field is that we would know the different types of gases we can encounter in the near future. We would know if this gas is harmful when fumes of chemicals is mixed with it or when it is good to use in everything the guess would touch. Like spraying air fresheners or spraying insecticide. By learning Gases, we would know the good and the harmful side of it.

    • jeaniejeanjean profile image

      Jean Abando Ortiz 23 months ago from Malolos,Bulacan

      26 ORTIZ,JA BUBSPSYCH 2014

      Like the other topics in CHEMISTRY this topic entitled gases is also very important in my course which is BS Psychology in of this topic is enhancing my knowledge about the properties,kinds,etc.That I can used someday in my future field.

    • Steph San profile image

      Steph San 23 months ago

      30 SANTIAGO STEPHANY S. BUHM

      Gases are an indispensable part of our lives. Gases preserve the freshness of food, or even help entertain us.

    • Brilliant Joshua Dela Cruz 23 months ago

      As Hospitality Management student, gas is consist of very small particles known as molecules.

    • reginajsangabriel profile image

      regina san gabriel 23 months ago from baliuag,bulacan

      san gabriel, RJ BUTM2014

      gases is very important in the field of tourism , gas use for transportation. to send the tourist to his/her destination. Gas also use for cooking. because a gas is one of the different phases of matter. Similar to liquids and plasmas, gases are fluids. This means that they have the ability to flow and that they will not usually return to their prior stage after they have been deformed. This doesn't mean that they don't have viscosity. A property of a gas that is different from that of a liquid is that; a gas does not occupy a fixed space or volume, but will instead expand to fill whatever container it is in, this is opposite of a liquid that will remain the same..

    • Krisette Enriquez 23 months ago

      13 ENRIQUEZ, KC BUTM 2014

      Gases is very important in the field of Tourism. 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.

    • Bernadette Devera profile image

      Bernadette Devera 23 months ago

      Devera B, BUTM 2014

      Gases are everywhere, yes 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.Gas also use for cooking.

    • Nicolit Fernandez profile image

      nicolite mae fernandez 23 months ago from Seoul, Korea

      14 FERNANDEZ, N.M.A. BUHM14

      Gas is very important in our field which is Hospitality Management because gas is about temperature and pressure which is we need in our course. We need to become knowledgeable when it comes to the types, properties, kinds and of gas. And we need to be careful or we need to be aware to the some types of gas that can cause fire. And gases are everywhere that’s why we need to study it.

    • jairafulgencio 23 months ago

      FULGENCIO, JM BUTM 2014

      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.

    • Leah Perez 23 months ago

      Perez , Leah mae E. BUHM 2014

      Gas use for cooking because a gas is one of the different phases of matter. Similar to liquids and plasmas, gases are fluids.

    • Casil PIBUHM08 profile image

      Casil PIBUHM08 23 months ago

      Gases are important to our course because without it hotels will not function properly. It is because we need gas in order to run the equipments like aircon, cable cars and we also use gas when we cook.

    • DeGuzmanMMBUHM15 profile image

      DeGuzmanMMBUHM15 23 months ago

      In hospitality management, gas is very important because we're going to used it in different things specially in cleaning like the use of air freshener and such. We're also going to use gas in preparing different foods, transportation and in others.

    • AngelicaBSHM1-1 profile image

      AngelicaBSHM1-1 23 months ago

      Gas is one of the four fundamental states of matter. Gas is very important in our course Hospitality Management because gas is used to preparing different kind of foods when we cook in a hotel.

    • Kimi Toledo 23 months ago

      TOLEDO, KM BUTM

      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. Gas is very helpful in terms of cooking food for HM and transportation for TM that's why we cannot live without gases because it is very useful and important in our daily living.

    • Agnes Sato profile image

      Agnes Sato 23 months ago from Baliuag, Bulacan

      We cannot live without gas. It has no definite size, shape, color, height, weight etc. But it is the one who keeps us alive. Tourism Students have the gas everywhere in airline industries while in Hospitality Management, they will use it for cooking. Gas is very important. Gas is everywhere. One of the most important in oyr lives.

    • Joshua Lim Calma profile image

      Joshua Lim Calma 23 months ago from San Miguel Bulacan

      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.

    • Carla Katrina profile image

      Carla Katrina Liwag 22 months ago from Baliwag, Bulacan

      LIWAG, CK BUHM

      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. Lots of gases are actually very useful to us.

    • Janice Gonzales 22 months ago

      GONZALES JB BUTM

      As a tourism student gas can help us in cooking foods and in preparering beverages.

    • Rollyne Munsayac profile image

      Rollyne Munsayac 22 months ago

      23 MUNSAYAC, RE BUTM 2014

      Gas is everywhere. It cannot be seen by our naked eye because it has no definite shape, color, volume and weight. It is very helpful in terms of cooking food and transportation.

    • Mikaela Alavar profile image

      1Alavar, MM BUHM 22 months ago from Villa Katrina, Tangos Baliwag Bulacan

      1ALAVAR MM BUHM

      Gases are invisible but they play in everyday things a visible role.

      In many areas, gases are an indispensable part of our lives. And on our field, as a HM student gases are really important. Because 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 inertization 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.

    • MARCELO JME BUTM 22 months ago

      Oxygen or Gas is vitally important for life on planet Earth. You aren't the sole living organism who breathes it, and the majority of living organisms living on planet Earth breath it in order to live. Oxygen,a standard temperature and pressure we know this outstanding chemical element in the form of gas with two atoms O2.

    • Chlaryse Tesaluna profile image

      Chlaryse Tesaluna 22 months ago

      Tesaluna, C BUTM 2014

      Gas is important for us because without it we cannot cook foods. We cannot live without gas, in tourism and hospitality management industry, it is very useful because it is used in airlines and in cooking foods.

    • Jen Angelo Garcia 22 months ago

      Gas are invisible in our Naked eyes. It is relevant to HM because we also use gases like nitrogen mainly liquid nitrogen as a substitute to cook foods or to freeze it in short period of time. Also we use different gases to cook food. Theere are alao gases use in housekeeping like aerosols and insecticides and many more

    • Pie Capistrano profile image

      Precious Alyssa Capistrano 22 months ago

      Gas is relevant to our course because we are using it in cooking and we have to be knowledgeable about volume, temperature and mass and how can we apply the relations of it to solve problems on gases.

    • Harri Nagalinngam profile image

      Harri Nagalinngam 22 months ago from Manchester, United Kingdom

      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

    • Daphne Santiago profile image

      29SantiagoMMBUHM 22 months ago from Bulacan

      29, SantiagoDNR BUHM

      Gas is important in our life specially in our course Hospitality Management. When you use your cooking gas wisely like proper selection of utensils, avoiding re-warming of food by just cooking it when you want; you will conserve gas also n your money will be saved.

    • James Leoni III profile image

      James Leoni III 22 months ago from Candaba, Pampanga

      20 Leoni James BUHM

      Gas is needed in HM specially in cooking so everything is really relevance in Chemistry.

    • Villacoba Kaye profile image

      Villacoba Kaye 22 months ago

      Gases plays an important role in us specially in our course because we are going to encounter them in our daily lives. When we are boiling water we can see it, temperature is included in gases because it measures how hot or cold is the food. In spraying some chemicals we can see it.Some law or theories explains on how to solve it.

    • Heidi Valerio profile image

      37ValerioMMBUHM 22 months ago

      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 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. 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.

    • michael steven 22 months ago

      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.

    • Johnrenz Santos profile image

      Johnrenz Santos 22 months ago from Candaba, Pampanga

      24 JRA SANTOS BSHM14

      Gases is the most important thing in earth because GAS have a big role in earth specially in the field of science GASES are composed of molecules and particles that can't be seen by human eyes. it is visible only if we try to know more about it and learn from it.

    • Bianca Turingan profile image

      Bianca Ysabelle Turingan 22 months ago from Tangos, Baliuag, Bulacan

      28 Turingan BY, BUHM 14

      This article will help us to understand more about Gases. And we'll know also the importance of studying it.

    • Cea Castillo profile image

      Cea Castillo 22 months ago

      A gas is one of the different phases of matter. Similar to liquids and plasmas, gases are fluids. This means that they have the ability to flow and that they will not usually return to their prior stage after they have been deformed. A property of a gas that is different from that of a liquid is that; a gas does not occupy a fixed space or volume, but will instead expand to fill whatever container it is in, this is opposite of a liquid that will remain the same.

    • KadowakiTBUHM profile image

      Takako Kadowaki 22 months ago

      21 Kadowaki T BUHM 14

      Gases is all around us. This is important because gases are including in our daily activities. We should know more about gases for us to be knowledgeable for reactions and effects of gases.

    • Bhel Marie profile image

      36MendozaMMBUHM 22 months ago

      Mendoza, BM BUHM1-1

      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.

    • AndreaBarcita profile image

      AndreaBarcita 22 months ago

      3 BARCITA AR M. BUHM14

      Gas is mostly important in terms of preparing food, studying its components will help us to determine the contents and hazards of it.

    • gelo hernandez profile image

      gelo hernandez 22 months ago

      Hernandez Angelo BSHM

      Gas is relevant to our course because we are using it in cooking and we have to be knowledgeable about volume and mass.We can easily determine whether the food we cook is over because the smell of it spreads easily. Gases are big part of the Hospitality Industry

    • Erica Joy Garcia 22 months ago

      16 Garcia EJM BUTM14

      the relevance of gases in our course is in airline it also provides resources and support to the tourism industry in the NWT for marketing, example of gas that is needed n Tourism is the helium. because it use in medical equipment that are available in an airplane whenever we are traveling.

    • AndreaBarcita profile image

      AndreaBarcita 22 months ago

      3 BARCITA AR M. BUHM14

      Gas is mostly important in terms of preparing food, studying its components will help us to determine the contents and hazards of it.

    • kennethcorpuz 22 months ago

      Gas particles are widely separated from one another, and consequently have weaker intermolecular bonds than liquids or solids. and about of protoplasma and energy like proton and neutron about of chemical bonds.

    • AlmiraEvangelista profile image

      AlmiraEvangelista 22 months ago

      Evangelista, Almira

      BSTM l-l

      Gas is very important for us as a human, for it is the most important thing that keeps us alive. Without it we cannot live because of oxygen.

    • Joyce De Guzman profile image

      Joyce De Guzman 22 months ago from San Ildefonso, Bulacan

      Gas is one of the three forms of matter, It is really important to us. We should know the different kinds of gasses and the effect of it, if it is harmful or useful. The relevance of gases is that in the Hospitality Industry we are using different form of gases in cleaning and cooking we should know how to use it properly without hurting others

    • kennethCorpuz 22 months ago

      GASES is a liquid solid and plasma. connect of tourism management because (FA) is go to airport and gas is a needed pilot and airplane like gases is delicate of tourism and needed of care and cargo for packaging. is a needed of energy for the gases.

    • kennethCorpuz 22 months ago

      GASES is a liquid solid and gas and plasma. because a important of tourism management and connect of (FA) and needed of gases the pilot and cargo and travel of a long ago.. and about the country...

    • Cess Capulong profile image

      Cess Capulong 22 months ago

      To be specific gases is everywhere. The air, the helium on the balloon my sister use to like and of course the gas on the plane we will someday soon work. There are types of gases, liquid, solid, gas and plasma. But some of gases may be dangerous so we need to use it accurate and carefully.

    • Patricia Rivera profile image

      Patricia Rivera 22 months ago

      Gas is important in everyday living because it is the reason why we are balanced in our world. And it is composed of gases, liquid, solid, gas and plasma.

    • Klaudine Bianca profile image

      2AlcantaraMMBUHM 22 months ago

      Gas is one of the three forms of matter. Every known Substance is either a solid, liquid, or gas. The relevance of gas in hospitality management is very important to our course. because when we preparing foods in hotel. We should know the different kinds of gases. We should know how to use it.

      02 Alcantara KB BUHM

    • Alyssa Serna 22 months ago

      Gas is a fossil fuel made primarily of methane, hydrogen and carbon. However, it was not until recently that methods for obtaining this gas, bringing it to the surface, and putting it to use were developed.

    • Sanguyo nicko 22 months ago

      Gases is very important to us as a human being, the relevance of this in the field of Hospitality Management is we should be Directly Proportional to our guest, we should be always no their moods. If they are mad we should be calm them down. And we should be Indirect proportional if they are something do wrong. This is very important characteristics of a future hotelier.

    • mchristinelopez profile image

      mchristinelopez 22 months ago

      LOPEZ, MARIE CHRISTINE, BUHM

      A gas is one of the different phases of matter. Similar to liquids and plasmas, gases are fluids. This means that they have the ability to flow and that they will not usually return to their prior stage after they have been deformed. This doesn't mean that they don't have viscosity. A property of a gas that is different from that of a liquid is that; a gas does not occupy a fixed space or volume, but will instead expand to fill whatever container it is in, this is opposite of a liquid that will remain the same.

    • Ralph Albert C. Cruz 22 months ago

      CRUZ RA BUHM

      The three important forms of matter are solid, liquid and gas. Without gas, life cycle would not be complete. Air, oxygen and carbon dioxide is a kind of gas and without those we, living things cannot breathe. Gas exist in water cycle and why we experience rain. Helium is a kind of gas which sustain inside the balloons. Clearly, gas is everywhere as much as solid and liquid and they are part of our daily basis.

    • honeygracesalonga 22 months ago

      SALONGA, HG C. BUHM 15

      GASES.

      The relevance of gases in our course is that it exists everywhere; from the gases we use for certain cooking equipments to function.

    • Rolyn Santos profile image

      Rolyn Santos 22 months ago from Bustos, Bulacan

      Gas a substance such as oxygen or hydrogen that is like air and has no fixed shape. A gas or mixture of gasdes that is burned as a fuel. A fluid as air that has neither independent shape nor volume but tends to expand indefinitely.

    • Arel Zcirem Canimo 22 months ago

      08 AZ CANIMO BUHM1-2 15

      The relevance of Gases in our field is that we would know the different types of gases we can encounter in the near future.For me as a Hospitality Management Student it is important for us to know more about Gases like the different theories and its behavior.

    • 19 Garcia R. BUHM 22 months ago

      Gas is very important in our field which is Hospitality Management because gas is about temperature and pressure which is we need in our course.

    • paguiligan julia profile image

      Julia Ann 22 months ago

      37 Paguiligan, JAT BUHM

      Gas is also very important to the field of Hospitality Management, because when we cooked a meals you need gas to produced a flame for heating our foods that we ate.

    • Arel Zcirem Canimo 22 months ago

      08 CANIMO, AZ BUHM1-2 15

      The relevance of Gases in our field is that we would know the different types of gases we can encounter in the near future as an Hospitality Management it is important for us to know more about Gases like the different theories and its behavior.

    • simplyariannejoy profile image

      simplyariannejoy 22 months ago

      17 Flores, AJ BUHM

      Gas is very important for us especially for the cooking industry. Cooking will be useless without it. Oxygen is an example of gas too. Nitrogen and Carbon dioxide keeps the plants alive and healthy. Plants are always use as the secondary or main ingredient in all types of dish. Vehicles will not move without it. We also need gas in cooking our favorite dish or food.

    • Josephdc profile image

      Josephdc 22 months ago

      Gas play a big role in our life as human. If theres no gas we wont be able to live in Earth. Also in Hospitality Management we use gas in different ways. Theres a methane gas that we use to produce fire and also the hydrogen gas we used it to prolong the a food or beverage.

      12Delacruz,JMBUHM

    • renzocauzon profile image

      renzocauzon 22 months ago

      09 Cauzon,RA BUHM

      Gas is one of the four fundamental states of matter. It is important to have gas in our everyday living. It is use for cooking and for us to live. Gas is very important to our course hospitality management.

    • Miguel Panlilio 22 months ago from Baliuag Bulacan

      PANLILIO M.A.R BUHM14

      it is very important to be aware of different types of gases especially in hospitality industry, some gases are useful but some are dangerous, and some are useful and needed yet very dangerous like LPG that we use in cooking. studying and understanding gas is helpful not just in hospitality industry but in everday lives.

    • Winnie Aquino profile image

      winnie rose inoncillo aquino 22 months ago from San Rafael, Bulacan

      2 Aquino, WR BUHM 2014

      Knowing and understanding what are gases is very much important to every person not only in the field of Hospitality Management, Tourism and other courses.

    • mikaela igaya 22 months ago

      18 IGAYA MC BUTM

      Gas is important in our industry also in our life. Because if gas is nothing in this world, we can't capable to use the something that can work with gas. Like transportation it cannot use if its not have a gas, also if we want to make a fire we need t a gas to make a fire in a simplest way.

    • Johnmarverickr 22 months ago

      It's very important to know different kinds of gases especially in Hospitality Management to help us to classify which is the dangerous or the safety one.

    • simplyariannejoy profile image

      simplyariannejoy 22 months ago

      17 Flores, AJ BUHM

      For me, gas is very important for us especially for the cooking industry. Cooking will be useless without it. Oxygen is an example of gas too. Nitrogen and Carbon dioxide keeps the plants alive and healthy. Plants are always use as the secondary or main ingredient in all types of dish. Vehicles will not move without it. We also need gas in cooking our favorite dish or food.

    • Eimon Paolo 22 months ago

      Eimon Paolo Sanchez

      Gas is very important in our industry it is use in many things like cooking. And we should study gas to know what its good and bad effect.

    • Jessa Pantan 22 months ago

      Gases is very important in Hospitality Management and in our daily lives. The air we breath is a gas, the gas we use in our cooking. Plants is the best source of Oxygen were needed by man. And as a man be create gas, the Carbon dioxide by exhaling that the plants need. There many uses of gas.

    • Ellen Canoza profile image

      Ellen Mae M. Canoza 22 months ago from Bonga Mayor, Bustos Bulacan

      03, Canoza EM BUHM

      The relevance of Gases in Hm students, its present everywhere but we cannot be seen by our naked eye because it has no fixed shape, has no color and has weight. Gas is very helpful in terms of cooking food for HM.Gas particles are widely separated from one another, and consequently have weaker intermolecular bonds than liquids or solids.

    • John Carlo Viola 22 months ago

      Gas is very important in the Hospitality industry especially in cooking and reheating food.

    • Carlo Buencamino profile image

      Jan Carlo Buencamino 22 months ago from Banga 2nd Plaridel Bulacan

      Gas is one of the main needed in Hospitality Management . Specially in Cooking . To cook food and ti prevent germs

    • Trisha Vanguardia profile image

      Patrisha Anne D.Vanguardia 22 months ago from San Ildefonso,Bulacan

      Gas is important for HM student because when you cook some dishes you will use gas so that it can be cook and be present nicely.

    • sarah aligato 22 months ago

      in our daily life, gases are very important component of chemistry. oxygen as a form of gas, is the most important because without this, we cannot live.

    • john angelo ortega bshm2 22 months ago

      as an hm student it is very much important to have knowledge about gases. in my industry, when I was assigned in the housekeeping department, it was very important because as a housekeeper, we need to maintain the cleanliness of the hotel, so to stay the good smell of the hotel, i need to use air freshener. this component easily combine in our air as a form of gas.

    • Reniel Carillo 22 months ago

      For me bec im HM student is very need to learn to gases if assigned me in kitchen i know my to do if we have problem.

    • Julien Villanueva profile image

      Julien Villanueva 22 months ago

      Villanueva Julien / BSHM 2014 2015

      By knowing things about gas, we could see how it is important to us. We can't always see gases. But we know it's there somewhere doing what is it supposed to do. Oxygen and Carbondioxide are the prime examples. We don't pay much attention to it. But we need it.

    • Mary rose Banzon 22 months ago

      As a tourism Student we should start learning about gases because we will encounter this topic in the time. Chemistry was everywhere and gases is part of it too. so being a tourism student we really need to study this matter.

    • Mary rose Banzon BSTM1-1 22 months ago

      As a tourism Student we should start learning about gases because we will encounter this topic in the time. Chemistry was everywhere and gases is part of it too. so being a tourism student we really need to study this matter.

    • Adrienne DelaCruz profile image

      Adrienne DelaCruz 22 months ago

      Being an hm student gases is very important to know,because gases is useful even in thr kitchen.

    • marjorie Lansangan BSHM 22 months ago

      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.

    • Capanas MJ BUHM profile image

      Capanas MJ BUHM 22 months ago

      Capanas MJ BUHM

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

    • Marife DG. Montejo 22 months ago

      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.

    • Melanie Samson profile image

      Melanie Samson 22 months ago

      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.

    • 27 PARUNGAO, GT BUTM 22 months ago

      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.

    • Elli Rose Gabriel profile image

      Elli Rose Gabriel 22 months ago

      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.

    • Jonna Mae Book profile image

      Jonna Mae Book 22 months ago

      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.

    • 28Quizon,CA BUTM 22 months ago

      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.

    • 28,QUIZON,CA BUTM 22 months ago

      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.

    • Phoebe Sp 22 months ago

      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.

    • Clarenz Maximo 22 months ago

      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.

    • Rad Mesina profile image

      Rad Mesina 22 months ago from Calumpit, Bulacan

      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.

    • Estacio M O BUTM profile image

      Estacio M O BUTM 22 months ago

      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.

    • Zyrine Mae Taruc 22 months ago

      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.

    • Castro F C BUTM profile image

      Fatima Cruz Castro 22 months ago

      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.

    • SarmientoMonic profile image

      Monic dela Cruz Sarmiento 22 months ago from San Miguel, Bulacan

      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.

    • Paulo Tomas profile image

      Paulo Tomas 22 months ago

      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.

    • Jole Ymenel Tila profile image

      Jole Ymenel Tila 22 months ago from Pulilan, Bulacan

      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.

    • Cess Capulong profile image

      Cess Capulong 22 months ago

      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.

    • Paolo Evangelista profile image

      Paolo Evangelista 17 months ago

      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.

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