Chemistry 9701 · 5 Chemical energetics
5.1 Enthalpy change, ΔH
Define standard enthalpy changes, construct reaction pathway diagrams, and calculate enthalpy changes using calorimetry and bond energies.
- Questions
- 226
- Years
- 2015–2026
- Multiple choice
- 133
- Written answer
- 93
- Average marks
- 6.1
Practise chemical energetics questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 13, 14133
- Paper 3variants 31, 32, 33, 34, 35, 3639
- Paper 2variants 21, 22, 2333
- Paper 5variants 51, 52, 5316
- Paper 4variants 41, 42, 435
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 7 | – | 7 |
| 2025 | – | 1 | – | 1 |
| 2023 | 2 | 14 | 10 | 26 |
| 2022 | 3 | 11 | 9 | 23 |
| 2021 | 4 | 7 | 11 | 22 |
| 2020 | 4 | 11 | 12 | 27 |
| 2019 | 2 | 13 | 12 | 27 |
| 2018 | 2 | 8 | 13 | 23 |
| 2017 | 3 | 10 | 9 | 22 |
| 2016 | 4 | 10 | 12 | 26 |
| 2015 | – | 13 | 9 | 22 |
