What Are the Freezing, Melting, and Boiling Points of Solids, Liquids, and Gases?
Definition of Boiling Point
The temperature at which a liquid boils and turns into a gas. The boiling point temperature will be lower if the atmospheric pressure is decreased. For example the boiling point of pure water at standard atmospheric pressure (or sea level) is 100°C (212°F) while at 10,000 feet (3,048m) it is 90.39° C (194.7°F). This decrease will affect the time it takes to cook anything in water to the extent that any food that requires five minutes to prepare at sea level will take around 20 minutes at 3km (10,000 feet). In theory you could also calculate your altitude by recording the temperature water boils at.
Solvent based liquids will generally have a lower boiling point than water. In other words they will require less heat to turn them into vapour. Liquids with a much lower boiling point than water are generally classed as flammable.
Definition of Freezing Point
The temperature at which a liquid becomes a solid. The freezing point temperature will be higher if the pressure is increased. This may not be by a noticeable amount due to the volume change upon melting being much smaller than the volume change (expansion) when boiling. For example the freezing point of pure water at standard atmospheric pressure (or zero feet) is 0°C (32°F) while at 11km (6 miles) above sea level it would only be 0.001°C higher.
The only known liquid that does not freeze, even at absolute zero, is liquid helium unless it is under pressure.
Definition of Melting Point
The temperature that a solid substance becomes a liquid. Some solids do not have a liquid state and will change directly from a solid to a gaseous state. This is called sublimation, e.g. Carbon Dioxide (dry ice).
Melting Point/Freezing Point
The terms melting point or freezing point are often interchanged depending on whether a substance is being heated or cooled. For liquids it is known as the freezing point and for solids it is called the melting point. The melting point of a solid and the freezing point of the liquid are normally the same.
Table of Boiling and Melting/Freezing Points at Sea Level (Standard Atmospheric Pressure). The information is provided in centigrade (Celsius).
A to C
Substance
| Boiling Point
| Freezing/Melting Point
|
|---|---|---|
Aluminium
| 2,519
| 660.3
|
Argon
| -185.8
| -189.34
|
Butane
| -1
| -140
|
Calcium
| 1,484
| 842
|
Carbon
| 4,827
| 3,550
|
Carbon Dioxide
| -57
| -78
|
Chloroform
| 61.2
| -63.5
|
Chlorine
| -34
| -101.5
|
Cobalt
| 2,870
| 1,495
|
Copper
| 2,562
| 1,085
|
E to M
Substance
| Boiling Point
| Freezing/Melting Point
|
|---|---|---|
Ethanol (Alcohol)
| 78.4
| -114
|
Gold
| 2,856
| 1,064
|
Glycerol
| 290
| 17.8
|
Helium
| -268.9
| -272.2
|
Hydrogen
| -252.9
| -259.1
|
Iodine
| 184.3
| 113.7
|
Iron
| 2,862
| 1,538
|
Lead
| 1,750
| 327.5
|
Magnesium
| 1,091
| 650
|
Mercury
| 356.7
| -38.8
|
Methanol
| 64.7
| -97.6
|
N to P
Substance
| Boiling Point
| Freezing/Melting Point
|
|---|---|---|
Neon
| -246
| -248.6
|
Nickel
| 2,913
| 1,455
|
Nitric Acid
| 83
| -42
|
Nitrogen
| -195.8
| -210
|
Oxygen
| -183
| -218.8
|
Phosphorus
| 280.5
| 44.2
|
Platinum
| 3,825
| 1,768
|
Plutonium
| 3,232
| 639.4
|
Potassium
| 758.8
| 63.4
|
Propane
| -42
| -188
|
R to Z
Substance
| Boiling Point
| Freezing/Melting Point
|
|---|---|---|
Radium
| 1,140
| 699.8
|
Radon
| -61.9
| -71.2
|
Sea Water
| 100.7
| -2
|
Silicon
| 2,357
| 1,414
|
Silver
| 2,162
| 961.8
|
Sodium
| 882.8
| 97.7
|
Sulphur
| 444.7
| 115.2
|
Sulphuric Acid
| 337
| 10.3
|
Tin
| 2,603
| 231.9
|
Titanium
| 3,287
| 1,668
|
Uranium
| 4,131
| 1,132
|
Water
| 100
| 0
|
Zinc
| 907
| 419.5
|
Comments
AUTHORThanks Nikolas
- AUTHOR
Thanks Nikos
interesting information
why do some drinks freeze faster than others
\
- AUTHOR
You may ask Garth....
In some traditional sense, you could consider water an element, but it doesn't qualify as an element according to the scientific definition. An element is a substance consisting of only one type of atom. Water consists of two types of atoms: hydrogen and oxygen so it is a compound.
May I ask how water is an element if it consists of hydrogen and oxygen?
- AUTHOR
You're welcome Raven1211
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- AUTHOR
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- AUTHOR
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Thank u
- AUTHOR
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- AUTHOR
Thanks
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In freezing point it is often stated that vapour pressure of liquid=vapour pressure of solid
How??? Can u please answer.
- AUTHOR
You're very welcome
Thanks for keeping this website it is usefull
- AUTHOR
Thank you
- AUTHOR
You are most welcome
Thankyou for evry think
- AUTHOR
Thanks "Anonymous" always glad to see that the article is helpful... that's thanks enough
- AUTHOR
Thanks Ella... hope it helped
-
-
BrianOldWolfCottage is so nice to have done this and 5he fact that he replies to comments makes ot even better. Keep up the good work and youshould be proud of yourself. You may not be appreciated day to day but know that we are grateful for this ane it helped me soo much.
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Thank you a lot for helping me out
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- AUTHOR
You're very welcome.
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- AUTHOR
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- AUTHOR
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- AUTHOR
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- AUTHOR
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- AUTHOR
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- AUTHOR
Thank You Mia
This page is fabtasic
could you help me a bit more with the freezing topic,
I have to do a ppt on it & i need a bit of help
it is very helpfull
but i was confused in co2 boiling pt
- AUTHOR
Thanks GFJ
Thanks GFJ
FLIPIN COOL
- AUTHOR
Well thank you Rocky.
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Thanks
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- AUTHOR
So pleased I could help. Good luck to you and your students.
thanks forthehelp
Gracias Brian. It absolutely helped my students to understand forms of substance because they could never understand my teachings.
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- AUTHOR
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Glad to be of help Emoney.
Thnks this helped me with an extra credit about argon
THX :)
Thank you so much
why is hydrogens melting point -259.1 but silvers melting point is 961.8
its cool that thats what it looks like...but i like seeing the new things about it. its cool...and interesting...but can you tell us something new about it? I'm in science class and i'm in 5th grade and we are learning about this stuff. kind of...we are learning solids, liquids and gases
I very intrested
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Thx for the help.
Thanks
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- AUTHOR
Thanks
Nice
I will ao that your good
too much info
For those asking what measurement it is in, it's in Celsius, as it says before the first table.
Hi this is very help full just next time add celsius,degree and fahrenheit
Interesting but it would be better if u added a bit more pesific info.
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Nice
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Is these degree Celsius or Fahrenheit?
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Classify a substance as solids, liquids and gases by looking at melting point and boiling point
good.thanks for education.
Can you help me name a liquid with a melting point of -15°C
Helpful
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