Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Working with Peng Robinson EOS

  1. Mar 20, 2010 #1
    1. The problem statement, all variables and given/known data

    Vapor mercury is to be adiabatically and reversibly compressed from 0.1 MPa to 10 MPa in a
    continuous process. Compute the work required in Joules per mole.

    Properties of Mercury

    Tc =1735 K, Pc =161 MPa.

    ω=-0.1644, CP/R =2.5


    2. Relevant equations
    The Peng Robinson Equation of State....(see attached file)

    work=delta(H)

    H=Cp*delta(T)

    (Cp/R)*R= Cp

    R=8.314

    3. The attempt at a solution
    I'm having trouble getting started. I think I need to solve PREOS for the T to find the change in T. But that can't be all because I still don't know the density. So that's one equation and twp unknown. On top of that, I have Pc, Tc rather than T and P. If I don't have Tr I can't find those.

    It must be rather apparent that I need some serious help. If anyone can help get me on the right track I would appreciate it very much.

    Thanks in advance.
     

    Attached Files:

    Last edited: Mar 20, 2010
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted