Question

You are given the following data.

S(s) + 3/2 O2(g) → SO3(g) ΔH = -395.2 kJ

2 SO2(g) + O2(g) → 2 SO3(g) ΔH = -198.2 kJ

Calculate ΔH for the reaction below.

S(s) + O2(g) → SO2(g)