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Homework Help: Variation of vapor pressure with temperature

  1. Mar 25, 2014 #1


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    1. The problem statement, all variables and given/known data
    The following link shows the variation of vapor pressure with temperature. In which way the data should be plotted to obtain a straight line?


    3. The attempt at a solution

    For this, I need to know exactly the mathematical relationship which I can't seem to find anywhere. Anyways, my immediate guess would be that the graph is an exponential function. So plotting the graph of lnP vs T would give me a straight line but the correct answer is lnP vs 1/T. I'm sure I'm missing something here.
  2. jcsd
  3. Mar 25, 2014 #2
    Are you familiar with the Clausius Clapeyron equation?

  4. Mar 25, 2014 #3
    This is the one component, two phase (solid-gas, liquid-gas) "version" of the Clausius-Clayperon equation.
  5. Mar 25, 2014 #4


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    Thanks to both of you.
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