Use the standard reaction enthalpies given below to determine Delta H°xn for the following reaction:

2 S(s) + 3 O2(g) → 2SO3(g) delta H°rxn = ?

Given:
SO2(g) → S(s) + O2(g) Delta H°rxn = +296.8 kJ

2 SO2(g) + O2(g) → 2 SO3(g) Delta -H°rxn = -197.8 kJ