Question

A reactor has feed of two streams, stream 1 has CO2 and H2O with mass fraction of 0.4 and 0.6 and rate 10 kg/hr, and stream 2 has CO2 and H2O with mass fraction 0.1 and 0.9 and rate 40 Kg/hr, what the mass fraction of CO2 in the product stream?

(a) 0.08

(b) 0.16

(c) 0.24

(d) 0.32

I have been asked this question in semester exam.

My enquiry is from Multiple Component Systems topic in section Introduction to Material Balances of Basic Chemical Engineering

Answer 1

Right answer is (b) 0.16

For explanation: Mass fraction of CO2 in product stream = (0.4*10 + 0.1*40)/(10 + 40) = 0.16.