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Mass of substance in a system (Heat transfer)

  1. Jun 21, 2015 #1
    1. The problem statement, all variables and given/known data
    A solid, 2.00 kg cube of nitrogen at -220.0oC is added to a 1.00 kg mixture of ice and

    water at 0.00 oC. If the final temperature of the mixture is -100.0 oC, how much ice was

    there in the original mixture?

    2. Relevant equations

    3. The attempt at a solution
    Don't know where to start
  2. jcsd
  3. Jun 21, 2015 #2

    rude man

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    heat gained = heat lost
  4. Jun 21, 2015 #3

    rude man

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    [Mentor's Note: The quoted post was deleted, but I'm leaving the quote since it should help the OP.]

    Did you remember that N2 is liquid below -196C and gas above that temperature?
    Oops, worse than that:
    solid below -210C, liquid -210 < T < -196, gas at T > -196.
    Need 3 specific heats and 2 latent heats!
    Last edited by a moderator: Jun 21, 2015
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