. An ideal mixture of two liquids A and B is put in a cylinder containing piston


An ideal mixture of two liquids A and B is put in a cylinder piston. Piston is pulled out isotherm ally so that the volume of liquid decreases but that of vapors increases. Negligibly small amount of liquid was left and model fraction of A in vapor is 0.4. If pA = 0.4 atm and pB = 1.2atm at the experimental temperature, which of the following is the total pressure at which the liquid is almost evaporated?

(A) 0.22 atm

(B) 0.431 atm

(C) 0.667 atm

(D) 1 atm

Best Answer

Correct Answer is:

(C) 0.667 atm

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