A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm is in equilibrium with an ideal liquid solution. The mole fraction of substance A is 0.5 in the vapour phase and 0.2 in t

Question

A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm is in equilibrium with an ideal liquid solution. The mole fraction of substance A is 0.5 in the vapour phase and 0.2 in the liquid phase. The vapour pressure of pure liquid A is  atm. (Nearest integer)

Canvas Classes · Accepted Answer

Strategy:
 This problem involves Dalton's law for the vapour phase and Raoult's law for the liquid phase. Use the mole fraction in the vapour phase to find the partial pressure of component A, then use Raoult's law to find the pure state vapour pressure.

Step 1: Calculate partial pressure of A () in the vapour
 (mole fraction in vapour), .

Step 2: Solve for } PA^\circ 	ext{ using Raoult's Law
 (mole fraction in liquid).

More questions from Solutions