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Van der Waals gas

  1. Sep 18, 2009 #1
    1. The problem statement, all variables and given/known data
    Calculate the isothermal compressibility and the expansion coefficient of a van der Waals gas. Show, using Euler's chain relation that

    [tex]\kappa[/tex]TR = [tex]\alpha[/tex](Vm - b).

    2. Relevant equations
    van der Waals equation
    virial expansion of state

    3. The attempt at a solution
    So I have to figure out
    -isothermal compressibility of van der Waals gas
    -expansion coeffcient of a van der Waals gas
    -show that the above equation is true using Euler's chain relation.

    I guess the first part has something to do with compressibility factor Z? I used Z = PV/RT and then plugged for p the van der Waals gas law. Probabaly incorrect.

    The second and third part I have no idea.
     
  2. jcsd
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