Given the reactions:
1) ½N₂(g) + ½O₂(g) → NO(g); Δ_r H° = 90 kJ mol⁻¹
2) NO(g) + ½O₂(g) → NO₂(g); Δ_r H° = -74 kJ mol⁻¹
Comment on the thermodynamic stability of NO(g).

Question

Accepted Answer

NO(g) is thermodynamically unstable because its formation from elements is endothermic and it readily reacts to form NO₂.

Questions

Given the reactions: 1) ½N₂(g) + ½O₂(g) → NO(g); Δ_r H° = 90 kJ mol⁻¹ 2) NO(g) + ½O₂(g) → NO₂(g); Δ_r H° = -74 kJ mol⁻¹ Comment on the thermodynamic stability of NO(g).

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