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Δng = 2 − 4 = −2, ΔH = ΔE − 2RT

1. (a) ΔH = ΔE − 2RT
2. (b) ΔH = ΔE + 2RT
3. (c) ΔH = ΔE − ΔnRT
4. (d) ΔH = ΔE + ΔnRT

Correct answer: (c) ΔH = ΔE − ΔnRT

Solution

The formula ΔH = ΔE − ΔnRT accounts for the work done by expanding or compressing gases, where Δn is the gas mole change.

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