At a given temperature the vapor pressures of benzene and toluene are 183 mm Hg and 59.2 mm Hg,respectively.Calculate the total vapor pressure over a solution of benzene and toluene with X_benzene = 0.520. A)95.2 mm Hg B)121 mm Hg C)124 mm Hg D)242 mm Hg

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Quizplus · Accepted Answer

The total vapor pressure over the solution can be calculated using Raoult's law: P_total = X_benzene * P_benzene + (1- X_benzene)*P_toluene Substituting the given values: P_total = 0.520*183 mmHg + (1-0.520)*59.2 mmHg = 124.04 mmHg Rounding off to two significant figures, we get: P_total = 124 mmHg Hence, the best choice is C.

At a Given Temperature the Vapor Pressures of Benzene and Toluene