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Assume each reaction is carried out in an open
\( \mathrm{P} \) container. For which reaction will \( \Delta H=\Delta E \) ?

W
(a) \( 2 \mathrm{CO}_{(g)}+\mathrm{O}_{2(g)} \rightarrow 2 \mathrm{CO}_{2(g)} \)
(b) \( \mathrm{H}_{2(g)}+\mathrm{Br}_{2(g)} \rightarrow 2 \mathrm{HBr}_{(g)} \)
(c) \( \mathrm{C}_{(\mathrm{s})}+2 \mathrm{H}_{2} \mathrm{O}_{(g)} \rightarrow 2 \mathrm{H}_{2(g)}+\mathrm{CO}_{2(g)} \)
(d) \( \mathrm{PCl}_{5(g)} \rightarrow \mathrm{PCl}_{3(g)}+\mathrm{Cl}_{2(g)} \)
(2006)
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