Heat of reaction at constant volume is identified with _____________ change?
Correct answer: A. Internal energy
- A. Internal energy
- B. Enthalpy
- C. Either A. or B
- D. Neither A. nor B
Explanation
At constant volume, boundary work is zero, so the heat supplied equals the change in internal energy, qᵥ = ΔU, assuming only pressure-volume work. At constant pressure, the corresponding heat is generally ΔH instead.
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