Question

Find α. If Xd=0.517 and Xw=0.3

(a) 1.3

(b) 2.5

(c) 5.6

(d) 3.4

I have been asked this question by my school teacher while I was bunking the class.

My question is based upon Simple Distillation topic in division Batch Distillation of Distillation Design

Answer 1

Correct choice is (b) 2.5

To explain I would say: As α = Xd(1-Xw)/ Xw(1- Xd) using values we have 0.517(1-0.3)/0.3(1-0.517) = 2.5.