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Physics 11 question help?

  1. Mar 2, 2009 #1
    1. The problem statement, all variables and given/known data

    A 3.0kg block of ice made in a fridge has an initial temp. of -5.0[tex]\circ[/tex]C. It
    is then moved to a much colder freezer. how much thermal energy is released by the ice as it cools to -40.0[tex]\circ[/tex]C?
    2. Relevant equations
    EH = mc[tex]\Delta[/tex]T
    for water, c = 4186 J/kg/[tex]\circ[/tex]C

    3. The attempt at a solution
    EH = mc[tex]\Delta[/tex]T
    EH = (3.0kg)(4186 J/kg/[tex]\circ[/tex]C)(-40.0[tex]\circ[/tex]C - -5.0[tex]\circ[/tex]C)
    = -439530 J
    but the answer should be 2.2 x 10^5 J
    Last edited: Mar 2, 2009
  2. jcsd
  3. Mar 2, 2009 #2


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    Homework Helper

    The specific heat of ice is different from that of water.
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