Given S(s) + O2(g) → SO2(g), ΔH formation = –297 kJ mol–1
and S(s) + 1.5 O2(g) → SO3(g) ΔH formation = –395 kJ mol–1
what is the enthalpy change of reaction, ΔH formation, of
2SO2(g) + O2(g) → 2SO3(g)?
A –196 kJ mol–1
B –98 kJ mol–1
C +98 kJ mol–1
D +196 kJ mol–1