The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be_______________?
Correct answer: D. 20%
- A. 10%
- B. 5%
- C. 18.18%
- D. 20%
Explanation
Take 100 mol of feed: it contains 10 mol H2, 10 mol O2 and 30 mol CO2, while water is removed on condensation. On a dry basis the remaining gas has 50 mol, so hydrogen is 10/50 = 20%.
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