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Thermodynamics Heat Calculation Problem

  1. Sep 1, 2009 #1
    Calculate the heat that must be supplied to a 500g copper kettle containig 750 g of water to raise its temperature from 23 degrees to the boiling point of water, 100 degrees.



    q=MCT



    qwater= 750 x 4.184 x 77= 241626 J

    qcopper= 550 x .38 x 77= 16093 J

    241626 + 16093 = 257719 J


    The answer in the back of the book says 26000. So I'm not sure if its right and they rounded up or I did it wrong and just got lucky that my answer was close.
     
  2. jcsd
  3. Sep 1, 2009 #2

    Ygggdrasil

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    Science Advisor

    Your answer is correct, but has the wrong number of significant figures. If you use the correct number of significant figures, your answer will also be 260 kJ (I assume you meant the book's answer was 260000 J, not 26000 J).
     
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