A-LevelChemistryChemical energetics9701/12 · Oct/Nov 2012 · Q41 Mark

Use of the Data Booklet is relevant to this question. A reaction which causes the presence of oxides of nitrogen in car exhausts is the formation of NO. N2 + O2 → 2NO ΔΗ = +180 kJ mol-1 What is the bond energy in kJ mol¯¹ of the bond between the atoms in NO?

A655

B835

C1310

D1670

✓ Correct answer

A: 655

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Topic: Chemical energetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2012 Paper 1 Variant 2, question 4.

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