Use the thermochemical data given to calculate ∆Hf° for N2O5(g) in kJ·mol-1. N2(g) + O2(g) → 2NO(g) — Thermodynamics Chemistry Question

Use the thermochemical data given to calculate ∆Hf° for N₂O₅(g) in kJ·mol^-1.
N₂(g) + O₂(g) → 2NO(g) ∆H° = +180.5 kJ
2NO(g) + O₂(g) → 2NO₂(g) ∆H° = –114.1 kJ
4NO₂(g) + O₂(g) → 2N₂O₅(g) ∆H° = –110.2 kJ