250+ TOP MCQs on Energy Balances for a Chemical Reaction – II and Answers

Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Energy Balances for a Chemical Reaction – I”.

1. Enthalpy change associated with the formation of 1 mole of a compound from its constituent elements and products in their standard state is called
a) Standard Heat of Formation
b) Heat of Reaction
c) Heat of Combustion
d) None of the mentioned
Answer: a
Clarification: Enthalpy change associated with the formation of 1 mole of a compound from its constituent elements and products in their standard state is called Standard Heat of Formation.

2. The heat of formation as ______ in the standard state for each stable element.
a) Zero
b) Cannot be calculated
c) Negative
d) positive
Answer: a
Clarification: The heat of formation as Zero in the standard state for each stable element.

3. Standard heats of formation are _________ for exothermic reaction.
a) Negative
b) Positive
c) Zero
d) None of the mentioned
Answer: a
Clarification: Standard heats of formation are negative for exothermic reaction.

4. Standard heats of formation are _________ for endothermic reaction.
a) Negative
b) Positive
c) Zero
d) None of the mentioned
Answer: b
Clarification: Standard heats of formation are negative for endothermic reaction.

5. _________________ is the enthalpy change that is associated with a reaction.
a) Standard Heat of Formation
b) Heat of Reaction
c) Heat of Combustion
d) None of the mentioned
Answer: b
Clarification: Heat of Reaction is the enthalpy change that is associated with a reaction.

6. Heating value is the negative of the ______________
a) Standard Heat of Formation
b) Standard Heat of Reaction
c) Standard Heat of Combustion
d) None of the mentioned
Answer: c
Clarification: Heating value is the negative of the Standard Heat of Combustion.

7. For enthalpy reference state is at which the enthalpy is
a) Zero
b) Positive
c) Negative
d) None of the mentioned
Answer: a
Clarification: For enthalpy reference state is at which the enthalpy is Zero.

8. Value of the negative of the heat of combustion when the product water is a vapour, is
a) Higher Heating value
b) Lower Heating value
c) Neither Higher nor Lower Heating value
d) None of the mentioned
Answer: b
Clarification: Value of the negative of the heat of combustion when the product water is a vapour, is Lower Heating value.

9. Value of the negative of the heat of combustion when the product water is a liquid, is
a) Higher Heating value
b) Lower Heating value
c) Neither Higher nor Lower Heating value
d) None of the mentioned
Answer: a
Clarification: Value of the negative of the heat of combustion when the product water is a liquid, is Higher Heating value.

10. Enthalpy change for the oxidation of 1 mole of a compound at standard condition is
a) Standard Heat of Formation
b) Standard Heat of Reaction
c) Standard Heat of Combustion
d) None of the mentioned
Answer: c
Clarification: Enthalpy change for the oxidation of 1 mole of a compound at standard condition is Standard Heat of Combustion.