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Thermal Properties - Specific heat.

  1. Apr 19, 2012 #1
    1. The problem statement, all variables and given/known data
    A well lagged calorimeter of mass 120g contains 200g of water and 50g of ice, initial at 0°C. A jet of steam is blown through the water until the water temperature reaches 30°C.

    Calculate the mass of steam that must condensed.

    The specific heat capacity of Copper: 380Jkg-1K-1
    The specific heat capacity of Water: 4200Jkg-1K-1
    The specific heat capacity of Ice: 2100Jkg-1K-1

    The specific latent heat of fusion of Ice: 3.25x105 Jkg-1
    The specific latent heat of vaporization of Water: 2.25x106Jkg-1


    2. Relevant equations
    Q=mcΔθ
    Q=ml

    3. The attempt at a solution
    My attempt was using Q=mcΔθ, for water (200x-3) x (4200) x (30) = 25200Jkg-1K-1

    And similar for Ice

    (50x10-3)x(2100)x(30)=3150Jkg-1K-1


    However to me it doesn't look like i'm going anywhere.. any help will be appreciated.
     
  2. jcsd
  3. Apr 19, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    Determine all the components that need to be warmed up. Calculate the total heat that needs to be added in order to bring all of those components to the final temperature.

    Where's the heat going to come from?
     
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