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Homework Help: Thermodynamics problem

  1. Apr 24, 2010 #1
    1. The problem statement, all variables and given/known data
    "100g of water vapour initally at 100deg, condenses on a small aluminium plate. The plate has dimensions 50cmx50cmx1cm and mass 6.75kg. The plate is initially at 5deg, and when thermal equilibium is reached the temperature of plate and water is 45.5deg. The total heat energy transferred to the plate from the water vapour is (in kJ): [The specific heat of aluminium is 910 J kg-1 K-1 the specific heat of water is 4190 J kg-1 K-1 and the latent heat of vapourisation for water is 2256 kJ kg-1]"

    2. Relevant equations



    3. The attempt at a solution

    Hey, im really confused as to what to do with this thermodynamics problem, like I know I can calculate Q1 to find the heat given from the water to the plate, but im not sure about what to do about latent heat and the volume. The possible answers are
    A)173
    B)205
    C)249
    D)281
    E)311

    could somone please show me the working out I have an exam tomorrow and I cant contact my lecturers (they wont reply lol)

    cheers guys
     
  2. jcsd
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