This is a multi-choice question. I am typing in the exact text.
Q) An equimolar saturated vapor mixture of A (more volatile) and B at 1 atm, is subjected to equilibrium condensation to yield 50 mol% of the feed as liquid. If the relative volatility is constant, the mole fraction of A in the equilibrium liquid phase shall be: relative volatility = alpha
let (just for easy typing): under-root(alpha)=k
a] k/(1+k) b] k c] 1/(1+k) d] (1+k)/k
Correct option is known. I'm not sure if I should tell it write now.
I have looked back at the basic definition of alpha many times now, (to solve this) expressed in terms of partial pressures; and I have tried to use Raoult's law, and played around with the partial pressures.
Please give an explained solution if its not too much trouble; (if its not a one line answer) since I'm not sure which concept I may be missing out on.
Referring- Treybal and McCabe-Smith-Hariott
Thank you