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Thermo Question on isothermal expansion

  1. Sep 24, 2009 #1
    1. The problem statement, all variables and given/known data
    I have a mixture of saturared water liquid vapor mixture at 200 c, volume = .03 m^3 at 15.54 Bars... the mixture undergoes an isothermal expansion and the volume doubles, what is the new pressure?

    mtotal = .301 kg
    2. Relevant equations
    this is my prob not sure which equation to use

    3. The attempt at a solution

    I am not sure which equation to use, and none of the tries i have made have worked... i assumed it as a linear equation and it didnt work...
  2. jcsd
  3. Sep 25, 2009 #2


    User Avatar
    Gold Member

    Do you have tables of thermodynamic properties of fluids at different temperatures and pressures?

    If so you can calculate the specific volume and use that to easily find the new pressure.
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