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Simple thermodynamics to be verified

  1. Mar 12, 2012 #1
    Hi everybody. I need to calculate the energy required to melt 1mm^3 of carbon steel which is initially at 20 degrees C. Knowing the melting temp (1535 C) and the specific heat per unit volume (C_v), can I calculate my energy (Q) as follows?:

    Q=C_v*(1535-23) = my answer

    Or is it wrong??

    Regards, and thanks for help.
  2. jcsd
  3. Mar 14, 2012 #2


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    Staff: Mentor

    Your answer is wrong. Not only must you heat the solid metal to that temperature, but you must add additional energy, the latent heat of fusion, to convert it from solid to liquid yet with no further rise in temperature.
  4. Mar 14, 2012 #3
    Thanks very much. That's what I thought I was missing, but I wasn't sure.

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