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Thermodynamics- Zemansky Heat and Thermodynamics book question

  1. Feb 4, 2011 #1
    1. The problem statement, all variables and given/known data

    A volume of 200cm3 of a paramagnetic substance is maintained at con-
    stant temperature. The magnetic eld is increased quasi-statically and
    isothermally from 0 to 10^6 A/m. Assume the Curie law to hold and the
    Curie constant per unit volume to be 1.885K/m3.

    (a) How much work would have to be done if no material were present? (Ans: 125.7 J)

    (b) How much work is done to change the total magnetization of the
    material when the temperature is 300K and when it is 1K? (Ans: 0.8J)

    (c) How much work is done to change the total magnetization by the
    generator supplying the current? (Ans: 236.9J)

    This question seems simple that is just simply substituting the numbers to the equation.. but I could not get to the answer. Can anyone help?
     
  2. jcsd
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