Thermochemistry | First Year Chemistry Past Papers MCQs | mosaicbro.com

Thermochemistry | First Year Chemistry Past Papers MCQs

7 of 38 questions (Page 2 of 6)

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8 The exothermic process is:
Correct Answer: C
Explanation: Respiration releases energy (exothermic); others require energy input (endothermic).
9 A state function which describes together the internal energy and the product of pressure and volume is called:
Correct Answer: A
Explanation: Enthalpy (H) = U + PV, where U is internal energy.
10 The total heat content of system is called:
Correct Answer: B
Explanation: Enthalpy represents the total heat content at constant pressure.
11 Whenever a reaction is exothermic, then it means that:
Correct Answer: D
Explanation: Exothermic reactions release heat (ΔH < 0) to the surroundings.
12 At constant volume, qᵥ is equal to:
Correct Answer: B
Explanation: At constant volume, heat change (qᵥ) equals change in internal energy (ΔE).
13 The value of ΔH being very small, the term Δ(PV) can be neglected for processes involving:
Correct Answer: B
Explanation: For condensed phases (liquids/solids), Δ(PV) ≈ 0 due to minimal volume changes.
14 In a Bomb calorimeter, the reactions are carried out at constant:
Correct Answer: C
Explanation: Bomb calorimeters measure ΔE at constant volume (rigid container).
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