7-35. No. 1

A mixture of two high boiling organic acids is to be separated from a small amount of non-volatile carbonaceous material by continuous steam distillation in a small still operating at 212°F and 200 mmHg. The organic acid mixture is equimolar with respect to the acids whose vapor pressures are 32 and 14 mmHg at 212°F. With the following assumptions:

a. The acid mixture obeys Raoult's Law
b. The acid mixture is immiscible in water
c. The carbonaceous material has no effect on equilibrium
d. The vapor leaves in equilibrium with the liquid in the still
How many pounds of steam are required per mole of acid recovered?