1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Heat energy removed

  1. Aug 14, 2013 #1
    What is the heat energy removed from a liquid when vapor is no longer present. This has been bugging me all day. I was thinking latent heat of sublimation cause ice seems to just melt in a ice machine due to door opening and closing and heat from air . Next guess was latent heat of fusion
  2. jcsd
  3. Aug 14, 2013 #2


    User Avatar
    Science Advisor

    You need to better describe the scenario you are thinking about. In general if something is warmer than its surroundings it will lose heat.
  4. Aug 14, 2013 #3
    True so It would be subcooling . Sublimation is the process of ice becoming water vapor without first going through a liquid stage.

    Subcooling is reducing the temperature of a liquid below its boiling point. If you have water sitting in a pan on the stove in your house, it is subcooled liquid water. It is below 212°F.
    Subcooling...latent heat of fusion relates to melting/freezing point, condensing/boiling relate to latent heat of vaporization and sublimation is a direct change of state from solid to vapor.
  5. Aug 15, 2013 #4
    As mathman has asked, what condition do you have where there is no vapour present and only liquid.
    For example, water in a pipe has no vapor present, and heat would be exchanged through the pipe walls via conduction, and perhaps convection, to the surroundings.
  6. Aug 15, 2013 #5
    In an ac system condenser
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook