Problem: Suppose that the gas-phase reaction 2NO(g) + O2(g) → 2NO2(g) were carried out in a constant-volume container at constant temperature.(a) Would the measured heat change represent ΔH or ΔE?(b) If there is a difference, which quantity is larger for this reaction?(c) Explain your answer to part (b).

FREE Expert Solution

Internal Energy:


E=q+w


Recall that work (w) is given by:


w=-PΔV


At constant V → w = 0


E=q+0E=q

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Problem Details

Suppose that the gas-phase reaction 2NO(g) + O2(g) → 2NO2(g) were carried out in a constant-volume container at constant temperature.

(a) Would the measured heat change represent ΔH or ΔE?

(b) If there is a difference, which quantity is larger for this reaction?

(c) Explain your answer to part (b).

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