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Heat contained in the Great Lakes

  1. Apr 30, 2008 #1
    1. The problem statement, all variables and given/known data
    the largest of the Great Lakes, Lake Superior contains 1.2*10^16kg of fresh water, which has a specific capacity of 4186J/kg*C and a latent heat of fusion of 3.33*10^5J/kg.
    a.) If Lake Superior were still liquid at 0C, how much energy would need to be removed from the lake for it to become completely frozen?

    2. Relevant equations

    3. The attempt at a solution

    Can someone just give me a hint or give me the equation to use because i have no clue what to do?
  2. jcsd
  3. Apr 30, 2008 #2


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    Homework Helper

    Hi princesspriya,

    The latent heat of fusion shows that it would require 3.33*10^5 J of heat to melt one kg of ice that is at 0 degrees celsius, or you would need to remove that much heat to freeze one kg of water at that same temperature.

    What equation does the latent heat appear in?
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