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Hess’s law past paper questions

Chemistry 9701 · Chemical energetics. 1 apply Hess’s law to construct simple energy cycles 2 carry out calculations using cycles and relevant energy terms, including: (a) determining enthalpy changes that cannot be found by direct experiment (b) use of bond energy data

In Cambridge A Level Chemistry 9701, Hess’s law came up in 64 of the 139 papers on Paperstreak, for about 2 marks a paper when it does. It last came up in October/November 2025.

Often set with Enthalpy change definitions, Structure and properties, Dot-and-cross diagrams, Le Chatelier's principle.

67 questions, newest first

1. 9701/21/O/N/25 Question 3 part (d(ii)) · 2 marks
2. 9701/22/O/N/25 Question 3 part (e(ii)) · 2 marks
3. 9701/23/O/N/25 Question 3 part (d(ii)) · 2 marks
4. 9701/12/M/J/25 Question 6 · 1 mark
5. 9701/12/F/M/25 Question 13 · 1 mark
6. 9701/11/O/N/24 Question 9 · 1 mark
7. 9701/12/O/N/24 Question 10 · 1 mark
8. 9701/13/O/N/24 Question 9 · 1 mark
9. 9701/22/O/N/24 Question 4 part (b) · 1 mark
10. 9701/11/M/J/24 Question 9 · 1 mark
11. 9701/21/M/J/24 Question 4 part (b(ii)) · 2 marks
12. 9701/22/M/J/24 Question 2 part (b(iii)) · 2 marks
13. 9701/12/F/M/24 Question 9 · 1 mark
14. 9701/12/O/N/23 Question 11 · 1 mark
15. 9701/21/O/N/23 Question 1 part (e(ii)) · 2 marks
16. 9701/22/O/N/23 Question 3 part (b(ii)) · 2 marks
17. 9701/23/O/N/23 Question 1 part (e(ii)) · 2 marks
18. 9701/11/M/J/23 Question 5 · 1 mark
19. 9701/12/M/J/23 Question 10 · 1 mark
20. 9701/11/O/N/22 Question 9 · 1 mark
21. 9701/13/O/N/22 Question 9 · 1 mark
22. 9701/21/O/N/22 Question 3 part (d(ii)) · 2 marks
23. 9701/23/O/N/22 Question 3 part (d(ii)) · 2 marks
24. 9701/11/M/J/22 Question 9 · 1 mark
25. 9701/13/M/J/22 Question 10 · 1 mark
26. 9701/12/F/M/22 Question 8 · 1 mark
27. 9701/22/F/M/22 Question 2 part (c(iii)) · 1 mark
28. 9701/21/O/N/21 Question 1 part (b(ii)) · 2 marks
29. 9701/23/O/N/21 Question 1 part (b(ii)) · 2 marks
30. 9701/11/M/J/21 Question 4 · 1 mark
31. 9701/13/M/J/21 Question 8 · 1 mark
32. 9701/12/F/M/21 Question 32 · 1 mark
33. 9701/22/F/M/21 Question 3 part (a(i)) · 2 marks
34. 9701/11/O/N/20 Question 7 · 1 mark
35. 9701/11/O/N/20 Question 31 · 1 mark
36. 9701/12/O/N/20 Question 33 · 1 mark
37. 9701/13/O/N/20 Question 7 · 1 mark
38. 9701/13/O/N/20 Question 31 · 1 mark
39. 9701/21/O/N/20 Question 2 part (c(ii)) · 2 marks
40. 9701/23/O/N/20 Question 2 part (c(ii)) · 2 marks
41. 9701/13/M/J/20 Question 4 · 1 mark
42. 9701/21/M/J/20 Question 3 part (b) · 3 marks
43. 9701/23/M/J/20 Question 3 part (c(iii)) · 2 marks
44. 9701/12/F/M/20 Question 4 · 1 mark
45. 9701/22/F/M/20 Question 1 parts (g(iii)) (g(iv)) · 3 marks
46. 9701/11/O/N/19 Question 7 · 1 mark
47. 9701/13/O/N/19 Question 7 · 1 mark
48. 9701/11/M/J/19 Question 8 · 1 mark
49. 9701/12/F/M/19 Question 8 · 1 mark
50. 9701/12/O/N/18 Question 7 · 1 mark
51. 9701/21/O/N/18 Question 3 part (a(ii)) · 3 marks
52. 9701/22/O/N/18 Question 3 part (a) · 3 marks
53. 9701/23/O/N/18 Question 3 part (a(ii)) · 3 marks
54. 9701/11/M/J/18 Question 7 · 1 mark
55. 9701/11/M/J/18 Question 33 · 1 mark
56. 9701/13/M/J/18 Question 7 · 1 mark
57. 9701/11/O/N/17 Question 8 · 1 mark
58. 9701/12/O/N/17 Question 7 · 1 mark
59. 9701/13/O/N/17 Question 8 · 1 mark
60. 9701/22/O/N/17 Question 2 part (a) · 1 mark
61. 9701/13/M/J/17 Question 6 · 1 mark
62. 9701/23/M/J/17 Question 3 part (a(ii)) · 2 marks
63. 9701/22/F/M/17 Question 2 part (c(i)) · 2 marks
64. 9701/21/O/N/16 Question 2 parts (c(i)) (c(ii)) · 5 marks
65. 9701/23/O/N/16 Question 2 parts (c(i)) (c(ii)) · 5 marks
66. 9701/12/M/J/16 Question 8 · 1 mark
67. 9701/12/F/M/16 Question 32 · 1 mark

More in Chemical energetics: Enthalpy change definitions, Bond energies, Calorimetry.

Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.