Chemical Engineering Questions and Answers – Standard Heat (Enthalpy) of Formation

This set of Basic Chemical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Standard Heat (Enthalpy) of Formation”.

1. For exothermic reactions, what is the heat of reaction?
a) Positive
b) Negative
c) Zero
d) Cannot Say
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2. For endothermic reactions, what is the heat of reaction?
a) Positive
b) Negative
c) Zero
d) Cannot Say
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3. Enthalpy of reactants is 15 J/Kg and enthalpy of products is 40 J/Kg, what is the heat of reaction?
a) -10 J/Kg
b) 10 J/Kg
c) -25 J/Kg
d) 25 J/Kg
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4. Enthalpy of reactants is 50 J/Kg and enthalpy of products is 25 J/Kg, what is the heat of reaction?
a) -10 J/Kg
b) 10 J/Kg
c) -25 J/Kg
d) 25 J/Kg
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5. Enthalpy of reactants is 30 J/Kg and enthalpy of products is 10 J/Kg, what is the heat of reaction?
a) -20 J/Kg
b) 20 J/Kg
c) -10 J/Kg
d) 10 J/Kg
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6. Heat of formations of A, B, C, and D, are 5 J, 10 J, 15 J, and 20 J respectively, what is the heat of reaction A + 4B -> 3C + D?
a) 10 J
b) 20 J
c) 35 J
d) 45 J
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7. Heat of formations of A, B, C, and D, are 5 J, 8 J, 2 J, and 15 J respectively, what is the heat of reaction 3A + B -> 3C + 2D?
a) 9 J
b) 10 J
c) 13 J
d) 15 J
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8. Heat of formations of A, B, C, and D, are 1 J, 2 J, 3 J, and 4 J respectively, what is the heat of reaction 3A + 4B -> 2C + D?
a) -1 J
b) 1 J
c) 3 J
d) 6 J
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9. Heat of formations of A, B, C, and D, are 2 J, 5 J, 3 J, and 10 J respectively, what is the heat of reaction 4A + 5B -> 2C + 2D?
a) -10 J
b) -7 J
c) -5 J
d) 0
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10. Heat of formations of A, B, C, and D, are 3 J, 5 J, 4 J, and 8 J respectively, what is the heat of reaction 2A + 2B -> 2C + D?
a) -5 J
b) 0
c) 5 J
d) 8 J
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11. In the reaction C + O₂ -> CO₂, if the heat liberated is 10 J, what is the heat of formation of CO₂?
a) -10 J
b) 10 J
c) 0
d) Cannot be determined
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12. In the reaction 2H₂ + O₂ -> 2H₂O, if the heat liberated is 50 J, what is the heat of formation of H₂O?
a) -25 J
b) 25 J
c) -50 J
d) 50 J
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13. In the reaction 2N -> N₂, if the heat liberated is 6 J, what is the heat of formation of N₂?
a) – 6 J
b) 6 J
c) 0
d) Cannot be determined
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14. In the reaction 2C + O₂-> 2CO, if the heat liberated is 10 J, what is the heat of formation of CO?
a) -5 J
b) 5 J
c) -10 J
d) 10 J
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15. In the reaction C + 2H₂ -> CH₄, if the heat liberated is -5 J, what is the heat of formation of CH₄?
a) -5J
b) 5 J
c) 0 J
d) Cannot be determined
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Sanfoundry Global Education & Learning Series – Basic Chemical Engineering.

To practice all areas of Basic Chemical Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.