For which one of the following equations is $\Delta $Horeact equal to $\Delta $Hof for the product ?

Question

For which one of the following equations is $\Delta $H^o_react equal to $\Delta $H^o_f for the product ?

Xe_(g) + 2F_2(g) $ \to $ XeF_4(g)

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

N_2(g) + O_3(g) $ \to $ N₂O_3(g)

CH_4(g) + 2Cl_2(g) $ \to $ CH₂Cl_2(l) + 2HCl_(g)

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