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Homework Help: Heat and melting ice

  1. Apr 27, 2013 #1
    1. The problem statement, all variables and given/known data
    A)You have a tank containing 750 mL of water and a heater outputting a max of 400 W. If you start with the water at 25 degrees, how long till it reaches boiling point?

    B) How much heat must be input to melt 1 gram of ice? What is the volume of meltwater does this produce?

    2. Relevant equations

    Conductivity for heat? Q/t = (k x A x delta temp)/ d
    Thats all I can think of

    3. The attempt at a solution
    I have tried with the coductivity of heat formula but i dont there is enough information given.

    I am so lost, I dont know where to start. Help please!
  2. jcsd
  3. Apr 27, 2013 #2
    This is more like a thermodynamics problem than a heat conduction problem. How many Joules of heat does it take to heat 750 ml of water from 25 C to 100 C? What is the definition of 1 Watt?
  4. Apr 28, 2013 #3


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    What chestermiller said. If not clear look up "heat capacity" and "Latent Heat" on wikipedia.
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