Hydrogen reacts with chlorine to form hydrogen chloride HCl times g , Δ⁢H_f=−92.3kJ/mol according to the reaction. cap h sub 2 of g plus Cl sub 2 times g rightarrow 2 HCl g Which statement is correct? Use Δ⁢H_rxn=∑(Δ⁢H_f_1p⁢r⁢o⁢d⁢u⁢c⁢t⁢s)−∑(Δ⁢H_f_1r⁢e⁢a⁢c⁢tan⁡t⁢s)