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Homework Help: Estimating Vapor Pressure and Vapor Mole Fraction

  1. Dec 15, 2009 #1
    1. The problem statement, all variables and given/known data

    The normal boiling points of benzene and toluene aer 80.1C and 110.6C, respectively. Both liquids obey Trouton's rule well. For a benzene-toluene liquid solution at 120C, with the molar fraction of benzene in the solution equalling 0.68, estimate the vapor pressure and benzene's molar fraction in the vapor. State any approximations made. Experimental values are 2.38 atm and 0.79.

    2. Relevant equations

    Raoult's law

    1= (molar fraction of benzene) + (molar fraction of toluene)

    3. The attempt at a solution

    Trying to figure out how to get set up

    x(Benzene, liq) = 0.68
    x(Toluene, liq) = 0.32
  2. jcsd
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