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Van der waals equation and molar specific heat

  1. Apr 22, 2014 #1
    the van der waals equation of state is given by (p+an^2/v^2)(v-nb)=nRT.how to show that for a gas obeying the above equation of state (∂Cv/∂V) (taking temperature constant)=0?
  2. jcsd
  3. Apr 24, 2014 #2


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    Just write out what the heat capacity means.
    ##C_v = \left(\frac{\partial{Q}}{\partial{T}}\right)_v = \left(\frac{\partial{U}}{\partial{T}}\right)_v##
    You know how to calculate the internal energy U? Write it using the equation of state.
  4. Apr 25, 2014 #3
    please explain vividly
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