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Thermodynamics about mixtures of ideal gases and vapors

  1. Aug 23, 2008 #1
    My question:
    For gaseous mixture say gas A, B, and C:

    I knew that X or the mole fraction is equivalent to volumetric fraction, when those gases have pressure and temperature the same with the mixture, and for dalton's law, the summation of the pressure of gases is equivalent to that of the mixture when volume and temperature are the same.

    Now, let say the volume and pressure of the components of the mixture is not equal with the mixture at the same time, how can I determine it? Can Xa=Va/Vm and Xa=Pa/Pm be equal at the same time?

    Thank you.
  2. jcsd
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