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Homework Help: Vapor Pressure

  1. Nov 21, 2009 #1
    1. The problem statement, all variables and given/known data

    Calculate the vapor pressure above liquid ethanol at 35 degrees C. The density of liquid ethanol at this temperature is 0.7767 kg/dm^3 and the true vapor pressure is 100 torr.

    2. Relevant equations

    K=P'/P , P'=vapor pressure, P=total pressure
    Antoine Equation: log P= A-B/(C+T)
    Raoult's Law: P*=xP, P*=partial pressure, P=Total Pressure

    3. The attempt at a solution
    ?? What is the difference between true vapor pressure and vapor pressure??
  2. jcsd
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