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Latent heat question

  1. Jun 1, 2015 #1
    1. The problem statement, all variables and given/known data
    50g of ice is placed in a 1kW microwave oven and the oven is turned to full power. Estimate the time it will take for the ice to melt. The specific latent heat capacity of ice in 330kJ −1 kg . Is your answer likely to be an overestimate or an underestimate? Explain your reasoning.

    2. Relevant equations
    ΔQ=mL

    3. The attempt at a solution
    ΔQ=mL
    1000xt=0.05x300
    .:. t=0.0165 ?

    This value seems very small :/
     
  2. jcsd
  3. Jun 1, 2015 #2

    BvU

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    Check your units
     
  4. Jun 1, 2015 #3
    Apologies, I had to do it really quickly. Is the answer correct though ?
     
  5. Jun 1, 2015 #4

    BvU

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    No
     
  6. Jun 1, 2015 #5
    Where have I gone wrong ?
     
  7. Jun 1, 2015 #6

    BvU

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    Compare the units on the lefthand side with the units on the righthand side
     
  8. Jun 1, 2015 #7

    BvU

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    Find it ?
     
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