EXAMPLE 2 14 A solution containing 0 1 mol of naphthalene and 0 9 mol of benzene is cooled out until some benzene freezes out

Question

EXAMPLE 2 14 A solution containing 0 1 mol of naphthalene and 0 9 mol of benzene is cooled out until some benzene freezes out The solution is then decanted off from the solid and warmed upto 353 K where its vapour pressure was found to be 670 mm The freezing point and boiling point of benzene are 278 5 K and 353 K respectively and its enthalpy of fusion is 10 67 kJ mol Calculate the temperature to which the solution was cooled originally and the amount of benzene that must have frozen out Assume ideal behaviour

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