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Homework Help: How much heat (calories) is required to raise the temperature

  1. Nov 12, 2008 #1
    1. The problem statement, all variables and given/known data
    How much heat (calories) is required to raise the temperature of 20 g water from 15oC to 95oC? The specific heat capacity of water is 1.0 cal/g*oC.

    2. Relevant equations

    3. The attempt at a solution

    95-15 = 80oC
    80oC *30 g = 2400 cal.

    Is that basically what you have to do? Or is there a more formal equation to use?
  2. jcsd
  3. Nov 12, 2008 #2


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    Science Advisor
    Homework Helper

    Re: Calories

    No - it is that simple.
    The definiation of a calorie is the energy needed to heat 1g of water 1deg C - isn't the metric system wonderful!

    If you are working in Joules and Kg the equation is Q = mcT Where 'c' is the specific heat capacity - the number of Joules needed to heat 1kg of water by 1deg C.
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