A-LevelChemistryChemical energetics9701/12 · May/June 2013 · Q321 Mark

The diagram shows the reaction pathway for a reversible reaction. [Figure 32.1] Which statements are correct? 1 The enthalpy change for the backward reaction is +90 kJ mol⁻¹. 2 The forward reaction is exothermic. 3 The enthalpy change for the forward reaction is –30 kJ mol⁻¹.

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A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

C: 2 and 3 only are correct

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Topic: Chemical energetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2013 Paper 1 Variant 2, question 32.

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