A gas mixture with 10% H2 with pressure 15 Pa at 27oC at the rate 20 liter/s is passed through a reactor and products a gas mixture with 30% H2 with pressure 25 Pa at 27oC, what is the rate of product?

Correct Answer: 4 liter/s
H2 balance: 0.1*15*20 = 0.3*25*P, => P = 4 liter/s.