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An equimolar solution of two volatile liquids A of M= 150 g/mol and B(M=200 g/mol)has vapour pressure 500 torr.If vapour pressure of pure B is 400 torr the fraction of componentA in vapour phase is
Total pressure = Xa*Pa + Xb*Pb500 = 0.5*Pa + 0.5*400Pa/2 = 500 – 200 = 300Pa = 600 torr. is the vapor pressure for pure B.
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