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July 31, 2014

Homework Help: Chemistry

Posted by Jude on Sunday, April 24, 2011 at 1:54am.

What is the mole fraction of benzene C6H6 in the VAPOR PHASE from a solution consisting of a mixture of benzene and n-hexame ch3(ch2)4ch3 at 27celsius, if the total pressure above the solution is 135.2 torr? The vapor pressures of benzene and n-hexame at 27 celsius are 103 and 161.7 torr respectively. Hint: Assuming these compounds form nearly ideal solutions when mixed together, determine the mole fraction of benzene in the liquid phase first, note that the mole fraction of benzene in the vapor phase will be its vapor pressure divided by total pressure.

I get x for benzene to be 0.451 but its incorrect. What should i be doing differently? Thanks

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