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in Mass Transfer by (37.1k points)
Find the feed composition of more volatile component by analysing the table below.

Enthalapy(kj/kmol) Composition

Distillate 800 0.95

Residue 200 0.2

Feed 500 ?

Hint: can neglect pre-heater.

(a) 0.45

(b) 0.575

(c) 0.6

(d) 0.65

This question was addressed to me during an internship interview.

Asked question is from Distillation in division Distillation of Mass Transfer

1 Answer

0 votes
by (39.8k points)
Correct answer is (b) 0.575

Easiest explanation: (xd- xf)/(xw- xf) =Hd- Hf/(Hw-Hf)

On applying values, we get xf= 0.575.

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