Chemistry 9701 · 23 Chemical energetics
23.3 Entropy change, ΔS
Define entropy, predict entropy changes during physical and chemical processes, and calculate standard entropy changes.
- Questions
- 21
- Years
- 2016–2026
- Multiple choice
- 0
- Written answer
- 21
- Average marks
- 11.4
Practise chemical energetics questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 4variants 41, 42, 43, 4421
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 1 | – | 1 |
| 2023 | – | 2 | – | 2 |
| 2022 | 1 | – | 1 | 2 |
| 2021 | – | 1 | 2 | 3 |
| 2019 | – | – | 3 | 3 |
| 2018 | – | 1 | 3 | 4 |
| 2017 | – | 2 | – | 2 |
| 2016 | 1 | – | 3 | 4 |
