Chemistry · Oct / Nov 2023 · Paper 11 · Question 14

Under certain conditions, nitrogen reacts with oxygen to form N₂O. 2N₂(g) + O₂(g) ⇌ 2N₂O(g) The reaction pathway diagram is shown. [diagram: energy vs progress of reaction; 2N₂(g) + O₂(g) at lower level, 2N₂O(g) at +164 kJ/mol, peak at +447 kJ/mol] What is the activation energy of the reverse reaction?

1. A–447 kJ/mol
2. B–283 kJ/mol
3. C+141.5 kJ/mol
4. D+283 kJ/mol

As printed in the paper