# For which of the following change $\Delta H = \Delta E?$

$(a)\;H_2(g)+I_2(g) \to 2HI(g)\\(b)\; HCl(ag)+NaOH (ag) \to NaCl(ag)+H_2O(l)\\(c)\;C(s)+O_2(g) \to CO_2(g) \\(d)\;N_2(g)+3H_2(g) \to 2NH_3(g)$

$N_2(g)+3H_2(g) \to 2NH_3(g)$ is correct
Hence d is the correct answer.