A-LevelChemistryChemical energetics9701/12 · May/June 2012 · Q81 Mark

The value of the third ionisation energy of aluminium is 2740 kJ mol⁻¹. Which correctly represents this statement?

AAl(g) → Al³+(g) + 3e⁻ ∆H° = −2740 kJ mol⁻¹

BAl²+(g) → Al³+(g) + e⁻ ∆H° = −2740 kJ mol⁻¹

CAl(g) → Al³+(g) + 3e⁻ ∆H° = +2740 kJ mol⁻¹

DAl²+(g) → Al³+(g) + e⁻ ∆H° = +2740 kJ mol⁻¹

✓ Correct answer

D: Al²+(g) → Al³+(g) + e⁻ ∆H° = +2740 kJ mol⁻¹

Oracle Prep sorts past-paper questions by topic, so you can drill Chemical energetics and see which topics are most likely to come up next.

Topic: Chemical energetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2012 Paper 1 Variant 2, question 8.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content