Sulfur reacts with oxygen to form sulfur dioxide SO sub 2 times g , Δ⁢H_f=−296.8kJ/mol ) according to the equation. cap s times s plus cap o sub 2 times g rightarrow SO sub 2 times g What is the enthalpy change for the reaction? 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)