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Thermo Help Compressbility

  1. Apr 22, 2009 #1
    Thermo Help!! Compressbility

    1. The problem statement, all variables and given/known data
    Ethane in a rigid vessel is to be heated from 50 psia and 100 F until its temperature is 600 F. What is the final pressure of the ethane as predicted by the compressibility chart?


    2. Relevant equations
    Pr=P/Pcr
    Tr=T/Tcr
    Pv=zRT


    3. The attempt at a solution
    this is a constant volume process.
    I found the z for the first state to be 0.95
    I dont understant hoe to find the final pressure, i tried to solve 2 Pv=RT equations to get

    z1T1/P1=z2T2/P2 but i am unable to find the second z factor so i am unable to solve for p2 and i going about this right
     
  2. jcsd
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