Consider the reaction: \( \mathrm{N}_{2}+3 \mathrm{H}_{2} \rightarr...

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Consider the reaction: \( \mathrm{N}_{2}+3 \mathrm{H}_{2} \rightarrow 2 \mathrm{NH}_{3} \) carried out at constant temperature and pressure. If \( \Delta \mathrm{H} \) and \( \Delta \mathrm{U} \) are the enthalpy and internal energy changes for the reaction, which of the following expressions is true ?
(a) \( \Delta \mathrm{H}\Delta \mathrm{U} \)
(b) \( \Delta \mathrm{H}\Delta \mathrm{U} \)
(c) \( \Delta \mathrm{H}=\Delta \mathrm{U} \)
(d) \( \Delta \mathrm{H}=0 \)
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