The vapour pressure of pure liquid a is 70 torr at 27 ° C. It forms an ideal solution with another liquid B. The mole fraction of B is 0.2 and total vapour pressure of the solution is 84 torr at 27 °

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The vapour pressure of pure liquid a is 70 torr at 27 ° C. It forms an ideal solution with another liquid B. The mole fraction of B is 0.2 and total vapour pressure of the solution is 84 torr at 27 ° C. The vapour pressure of pure liquid B at 27 ° C, is

TestHub · Accepted Answer

Mole fraction of B ( X B ) = 0.2 Mole fraction of A ( X A ) = 0.8 Total vapour pressure P = X A . P A o + X B P B o 84 = 0.8 × 70 + 0.2 P B o P B o = 140 torr

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