O-LevelChemistryRates of Reaction5070/11 · Oct/Nov 2017 · Q171 Mark

Under certain conditions nitrogen reacts with oxygen to form N₂O. 2N₂(g) + O₂(g) ⇌ 2N₂O(g) The energy profile diagram for this reaction is shown. What is the activation energy for the reverse reaction?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A–447 kJ/mol

B–283 kJ/mol

C+141.5 kJ/mol

D+283 kJ/mol

✓ Correct answer

D: +283 kJ/mol

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 1, question 17.

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