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Homework Help: Thermodynamics - LATENT HEAT

  1. Jun 14, 2010 #1
    1. The problem statement, all variables and given/known data
    how much energy is required to change a 40g ice cube from ice at -10degrees C to steam at 110degrees C.


    2. Relevant equations
    Q=mL
    Q=mcT

    3. The attempt at a solution
    My failed attempt was this,
    0.04*120*333000(333000 is the latent fusion heat for water)
    i don't know if there is any other way i can do this, any help would be appreciated
     
  2. jcsd
  3. Jun 14, 2010 #2
    You need to break the problem down into a number of steps; some (2) will be latent heat (ice to water, and water to steam) and some (3) will be specific heat capacity (change in temperature of ice, water and steam)
    You will need the following data
    Specific heat capacity of ice, water and steam
    Latent heat of fusion of ice
    Latent heat of evaporation of water
    There are 5 steps. 5 amounts of heat to add together.
     
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