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March 24, 2017

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The vapor pressure of an organic solvent is 50 mm Hg at 25°C and 200 mm Hg at 45°C. The solvent is
the only species in a closed flask at 35°C and is present in both liquid and vapor states. the system pressure is 760mmHg. Determine the
mole fraction of solvent in the gas phase.

  • Chemistry help - ,

    I would use the Clausius-Clapeyron equation and solve for delta Hvap. Using that number, then solve for vapor pressure of the organic solvent at 35C (again using the CC equation). Then mole fraction = Psolvent/Ptotal.

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