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Homework Help: Mass using Q=m*C*delta T

  1. Apr 29, 2009 #1
    1. The problem statement, all variables and given/known data
    An aluminum cup contains 217g of water at 21.2oC. A 404g sample of silver at an initial temperature of 80.8oC is placed in the water. A 41.0g copper stirrer is used to stir the mixture until it reaches its final equilibrium temperature of 25.7oC. Calculate the mass of the aluminum cup.

    2. Relevant equations
    heat lost=heat gained

    3. The attempt at a solution
    Could someone please help me set the problem up w/o numbers. Thanks.
  2. jcsd
  3. Apr 30, 2009 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    You have the right equations to work with, maybe listing a few facts will help get you going:

    Every object will end up at the final temperature of 25.7C.

    Each object either loses heat, or gains heat. That tells you on which side of the heat lost=heat gained equation each object belongs.

    Presumably the copper stirrer also starts out at 21.2C.
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