A gas mixture has 10% CH4 with pressure 5 Pa at 27^oC at the rate F, is passed through a reactor with another stream containing 60% CH4 with pressure 5 Pa at -73^oC at the rate 10 liter/s, if the percentage of CH4 with pressure 5 Pa at 27^oC in product is 80%, what is the value of F?(a) 1 liter/s(b) 1.4 liter/s(c) 2 liter/s(d) 2.6 liter/sThis question was posed to me in a job interview.This key question is from Material Balances Involving Ideal Gases in section Recycle, Bypass, Purge, Ideal Gases and Real Gases of Basic Chemical Engineering

A gas mixture has 10% CH4 with pressure 5 Pa at 27^oC at the rate F, i

1.	A gas mixture has 10% CH4 with pressure 5 Pa at 27^oC at the rate F, is passed through a reactor with another stream containing 60% CH4 with pressure 5 Pa at -73^oC at the rate 10 liter/s, if the percentage of CH4 with pressure 5 Pa at 27^oC in product is 80%, what is the value of F?(a) 1 liter/s(b) 1.4 liter/s(c) 2 liter/s(d) 2.6 liter/sThis question was posed to me in a job interview.This key question is from Material Balances Involving Ideal Gases in section Recycle, Bypass, Purge, Ideal Gases and Real Gases of Basic Chemical Engineering
Answer» The correct CHOICE is (b) 1.4 liter/s Explanation: Overall MATERIAL balance: F + 10 = P, Overall CH4 Balance: 0.1F5/300 + 0.6105/200 = 0.8P5/300, => F + 90 = 8P, => F = 10/7 = 1.4 liter/s.

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