At 334 K the vapour pressure of benzene (C6H6) is 0.526 atm and that of toluene (C7H8) is 0.188 atm. In a solution containing 0.500 mole of benzene and 0.500 mole of toluene, what is the vapour pressure of toluene above the solution at 334 K?

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0.188 atm

0.10 atm

0.357 atm

0.094

answer is D.

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Detailed Solution

PTol=PTotalo×XTotal =0.188×0.5 =0.094

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