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Homework Help: Heat/ Energy

  1. Apr 9, 2007 #1
    1. The problem statement, all variables and given/known data
    Calculate the amount of heat energy required to melt a 10 Kg block of ice at 0 degrees C into liquid water at 0 degrees C. The latent heat of fusion for water is 3.34 * 10to the 5

    2. Relevant equations

    Q = mc(change in temperature)

    3. The attempt at a solution

    Q = (10)(3.34 * 10to the 5)(0)
    Q= 0
    Last edited: Apr 9, 2007
  2. jcsd
  3. Apr 9, 2007 #2


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    Homework Helper

    That is not the equation for thermal energy involving latent heat of fusion.
  4. Apr 9, 2007 #3
    that is exactly what the question said...Actualy therre is a typo I'll edit it
  5. Apr 9, 2007 #4


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    Homework Helper

    The ice is undergoing a phase change here (from ice at 0 degrees to water at 0 degrees). In this situation, there is no change in temperature even though thermal energy is being generated. The equation you are using is not the one you need for this. You need Q=mL, where m is the mass of the ice, and L is the latent heat (of fusion in this case). Look it up.
  6. Apr 9, 2007 #5
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