Question

In a reaction the feed is 10 moles of 0.1 glucose and 0.9 water, and another feed of 5 moles of 0.4 glucose and 0.6 water, what is the fraction of water in the products?

(a) 0.2

(b) 0.4

(c) 0.6

(d) 0.8

I had been asked this question during an interview.

My enquiry is from Solving Energy Balance Problems topic in section Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction of Basic Chemical Engineering

Answer 1

Correct answer is (d) 0.8

Explanation: Total moles of products = 10 + 5 = 15, water balance: 0.9*10 + 0.6*5 = x*15, => x = 0.8.