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Homework Help: Entropy change for van der waals gas Problem

  1. Jan 27, 2012 #1
    1. The problem statement, all variables and given/known data

    Consider Entropy change for van der waal gas

    Prove that

    ΔH = {bRT[1/(V2-b)-1/(V1-b)]}-2a/V2+2a/V1


    2. Relevant equations

    Ideal gas : PV = nRT ,

    Enthalpy : ΔH = U + PV ,

    Real gas : nRT = (P + a/(V2))(V-b)

    3. The attempt at a solution

    I prove from PV = nRT in real gas it's going to be nRT = (P + a/(V2))(V-b).

    and Integral but it not come to ΔH = {bRT[1/(V2-b)-1/(V1-b)]}-2a/V2+2a/V1

    I can't prove to this form. Can you help me to solute this problem?.

    Thank you.
     
    Last edited: Jan 27, 2012
  2. jcsd
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