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Calories Required to Raise the Temp of Aluminum

  1. Aug 30, 2014 #1

    Drakkith

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    Staff: Mentor

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

    How many calories are required to raise the temperature of 26 grams of aluminum from 20°C to 115°C?

    2. Relevant equations

    Specific heat of aluminum is 0.22 cal / g x °C

    Amount of heat = SH x mass x (T2-T1)

    3. The attempt at a solution

    Plugging numbers into the 2nd equation gives me:

    cal = 0.22 x 26 x 95
    cal = 543.4

    So I get 543.4 calories as the answer, or 5.4 x 102 calories. However, my workbook only has the following as possible answers:

    5.4 x 10+1
    5.4 x 10-1
    5.4 x 10+3
    5.4 x 10-3

    Have I missed something here, or is my workbook wrong?
     
  2. jcsd
  3. Aug 30, 2014 #2

    berkeman

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    Staff: Mentor

    I'm no expert in this, but your numbers look okay to me.
     
  4. Aug 31, 2014 #3

    Mark44

    Staff: Mentor

    I agree with your answer, Drakkith. It seems to me that your workbook has a typo, unless you copied some of the information incorrectly.
     
  5. Aug 31, 2014 #4

    Drakkith

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    Staff: Mentor

    Nope, that's exactly what it says.
    Thanks guys.
     
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