Calculate ΔH° for the process Zn (s) + S (s) + 2O₂(g) → ZnSO₄(s) from the following information:
Zn(s) +S(s) → ZnS(s) ΔΗ° = -206.0 kJ
ZnS(s) + 2O₂(g) → ZnSO₄(s) ΔΗ° = -776.8 kJ