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Homework Help: Grams and volume of steam needed to raise the temperature of expresso

  1. Feb 10, 2008 #1
    [SOLVED] Grams and volume of steam needed to raise the temperature of expresso

    1. The problem statement, all variables and given/known data

    The temperature of espresso coffee (mostly water) can be increased by blowing 100°C steam into it. How much steam (in grams) is needed to heat up a 13 cm3 cup of espresso from 46°C to 82°C? What is the volume of this quantity of steam, assuming that the steam is an ideal gas


    2. Relevant equations

    Q=mcdeltaT

    dq=Cv*dt



    3. The attempt at a solution

    I know that the specific heat- amount of heat needed to raise the temperature 1 degree -is 4.186 J/gC. But I really don't have any idea as to how to start the problem. I tried using Q=mcdeltaT, but I don't have a value for Q.

    I would appreciate any help in getting started. Thank you.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
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