This set of Chemical Process Calculation Questions focuses on “Species Mole Balances-II”.
1. In ammonia production, a reactor is supplied with a feed of 10 moles of N2 and 40 moles of H2. If the reaction takes place completely, what is the extent of the reaction?
a) 10
b) 15
c) 20
d) None of the mentioned
View Answer
Explanation: Extent of the reaction = Moles reacting in the reaction.
2. In ammonia production, a reactor is supplied with a feed of 10 moles of N2 and 40 moles of H2. If the reaction takes place completely, what is the number of moles of N2 remaining after the reaction?
a) 0
b) 5
c) 10
d) None of the mentioned
View Answer
Explanation: As the reaction goes to completion, N2 is completely consumed, leaving zero moles of N2.
3. In ammonia production, a reactor is supplied with a feed of 10 moles of N2 and 40 moles of H2. If the reaction takes place completely, what is the number of moles of H2 remaining after the reaction?
a) 10
b) 15
c) 20
d) None of the mentioned
View Answer
Explanation: Moles of H2 = Initial moles of H2 – 3(Extent of the reaction).
4. In ammonia production, a reactor is supplied with a feed of 10 moles of N2 and 40 moles of H2. If the reaction takes place completely, what is the number of moles of NH3 produced?
a) 10
b) 15
c) 20
d) None of the mentioned
View Answer
Explanation: Moles of NH3 = 2(Extent of the reaction).
5. In ammonia production, a reactor is supplied with a feed of 10 moles of N2 and 40 moles of H2. If the reaction takes place completely, which reactant is the limiting reactant?
a) N2
b) H2
c) Both N2 and H2
d) Neither N2 nor H2
View Answer
Explanation: N2 has lower extent of reaction.
6. In ammonia production, a reactor is supplied with a feed of 10 moles of N2 and 40 moles of H2. If the reaction takes place completely, which reactant is the excess reactant?
a) N2
b) H2
c) Both N2 and H2
d) Neither N2 nor H2
View Answer
Explanation: H2 has higher extent of reaction.
7. A reactor is supplied with a feed of 46% C3H7O4, 44% O2, and 10% N2. The following reaction takes place: 4C3H7O4 + 11O2 → 12CO2 + 14H2O. If 50% of the limiting reagent conversion takes place, what is the percentage of O2 in the product?
a) 10
b) 18
c) 38
d) 54
View Answer
Explanation: Assume that 100 moles of feed is present in the reactor and do the material balance for each, Percentage of O2 = 18%.
8. A reactor is supplied with a feed of 46% C3H7O4, 44% O2, and 10% N2. The following reaction takes place: 4C3H7O4 + 11O2 → 12CO2 + 14H2O. If 50% of the limiting reagent conversion takes place, what is the percentage of N2 in the product?
a) 8
b) 18
c) 34
d) 46
View Answer
Explanation: Assume that 100 moles of feed is present in the reactor and do the material balance for each, Percentage of N2 = 8%.
9. A reactor is supplied with a feed of 46% C3H7O4, 44% O2, and 10% N2. The following reaction takes place: 4C3H7O4 + 11O2 → 12CO2 + 14H2O. If 50% of the limiting reagent conversion takes place, what is the percentage of C3H7O4 in the product?
a) 10
b) 16
c) 31
d) 43
View Answer
Explanation: Assume that 100 moles of feed is present in the reactor and do the material balance for each, Percentage of C3H7O4 = 31%.
10. A reactor is supplied with a feed of 46% C3H7O4, 44% O2, and 10% N2. The following reaction takes place: 4C3H7O4 + 11O2 → 12CO2 + 14H2O. If 50% of the limiting reagent conversion takes place, what is the percentage of H2O in the product?
a) 15
b) 23
c) 39
d) 51
View Answer
Explanation: Assume that 100 moles of feed is present in the reactor and do the material balance for each, Percentage of H2O = 23%.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.
