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Homework Help: Specific Heat (kCal and J) for copper, help please!

  1. Sep 22, 2011 #1
    1. The problem statement, all variables and given/known data
    How much heat is required to raise the temperature of a 50 gram cube of copper from 20 degrees Celsius to 45 degrees Celsius? (in kcal and J)
    Specific Heat(20degrees Celsius) for Copper (kcal/kg x degrees Celsius) is 0.092. and the Specific Heat for Copper (J/kg x degrees Celsius) is 385.

    2. Relevant equations
    H = mc (triangle) T

    3. The attempt at a solution
    so the first thing I did was convert the 50 grams to 0.05 kg, then I set up the equation by putting "H = 0.05kg x 20degrees x 25 degrees. but then that's where i got stuck because I didn't know how to incorporate the specific heat into this.
  2. jcsd
  3. Sep 22, 2011 #2


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    Homework Helper

    I highlighted a couple of items in your post; the thing you wanted to calculate.

    You know m - you even converted it to kg; good.
    You know C [you were given its value in 2 unit systems, I would be using the SI unit value to find Joules.
    You know delta T [20 to 45 equals a change of .....]

    Substitute and calculate.
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