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Phase changes

  1. Jul 24, 2011 #1
    This might be a question with an obvious answer, but i want to make sure.

    During the phase changes from a gas to a liquid and from a liquid to a solid, the gas must give off heat, right... so the air around it gets warmer since the surroundings gain heat?
  2. jcsd
  3. Jul 24, 2011 #2


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    Staff Emeritus
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    Yep! Cooling something down, which is simply removing heat, is how you condense or freeze things. In a freezer or refrigerator the air warms up and is continually cooled back down by the fridge.
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