A-LevelChemistryChemical energetics9701/12 · May/June 2024 · Q91 Mark

Ethane can react with fluorine to produce 1,2-difluoroethane, C2H4F2. C2H6 + 2F2 → C2H4F2 + 2HF ∆H = −960 kJ mol⁻¹ [Table 9.1] What is the bond energy of the C–F bond in 1,2-difluoroethane?

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A407 kJ mol⁻¹

B474 kJ mol⁻¹

C486 kJ mol⁻¹

D972 kJ mol⁻¹

✓ Correct answer

C: 486 kJ mol⁻¹

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Topic: Chemical energetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2024 Paper 1 Variant 2, question 9.

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