Question

The Total pressure observed by mixing two liquid A and B is 350 mm Hg when their mole fractions are 0.7 and 0.3 respectively.

The Total pressure becomes 410 mm Hg if the mole fractions are changed to 0.2 and 0.8 respectively for A and B. The vapour pressure of pure A is ______ mm Hg. (Nearest integer)

Consider the liquids and solutions behave ideally.

Answer 1

Let V.P. of pure A be P_A⁰

Let V.P of pure B be P_B⁰