Assume each reaction is carried out in an open container. For which reaction will $\Delta $H = $\Delta $E ?

Question

2CO_(g) + O_2(g) $ \to $ 2CO_2(g)

H_2(g) + Br_2(g) $ \to $ 2HBr_(g)

C_(s) + 2H₂O_(g) $ \to $ 2H_2(g) + CO_2(g)

PCl_5(g) $ \to $ PCl_3(g) + Cl_2(g)

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