Calculate the standard enthalpy change, ΔH298∘, for the reaction
2 SO2(g) + O2(g) → 2 SO3(g)
using the following standard enthalpies of formation:
ΔHf∘(SO2, g) = –296.8 kJ mol–1
ΔHf∘(SO3, g) = –395.7 kJ mol–1.
Report your answer in kJ (to the nearest kJ).