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A humble question

  1. Sep 14, 2006 #1
    Does ice melt or remain frozen at 0 degree celcius?
  2. jcsd
  3. Sep 14, 2006 #2
    He,he,he :Both!
  4. Sep 14, 2006 #3
    Thanks to latent heat (look up Clausius-Clapeyron equation for more details)
  5. Sep 14, 2006 #4


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    Are you adding or removing energy (heat)? Are you increasing or decreasing pressure?
  6. Sep 18, 2006 #5
    no energy is removed or added and pressure is at a constant 1 atm.
  7. Sep 18, 2006 #6
  8. Sep 18, 2006 #7


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    Tehno is right, it does do both. Molecules are constantly joining and departing from the surface at the same time. The ratio stays about the same unless the temp is added or removed.
  9. Sep 18, 2006 #8

    Claude Bile

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  10. Sep 18, 2006 #9
    H20 does not have a triple point at atmospheric pressure.
  11. Sep 18, 2006 #10
    lol...if that was the case we'd be dead.
  12. Sep 18, 2006 #11
    In general there is a coexistence region whereby two phases will be simultaneously present. This happens over an extended temperature range and if predicted by the van der Waals equation of state. I am unsure what this is for water but there is no definate point at which we have either a totally water or totally ice, just proportions of either.
  13. Sep 18, 2006 #12
    oops i didnt read that pressure will be constant , sorry... well ice will start melting atzero degree celsius
  14. Sep 19, 2006 #13
    so does it remain frozen...or does it start to melt???:confused:
  15. Sep 19, 2006 #14

    Doc Al

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    It takes energy to melt ice. If you don't add any, the ice won't melt.
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