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Chemistry 0620/42 · June 2024
2/31 (a)Explain, in terms of particles, why increasing the temperature increases the rate of a reaction.
[3]Your answer
- Particles move faster and have more kinetic energy.
- They collide more often, so there are more collisions per second.
- More of the particles react when it is hotter.
M2“collisions become more frequent”, official mark scheme, June 2024
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Explain, in terms of particles, why increasing the temperature increases the rate of a reaction.
0620/42 · June 2024 · Q1(a) · [3]
- 01
Lost scheme point
A1“more particles have energy above the activation energy”
- 02
Diagnosis
KGknowledge gap
You explained faster particles and more collisions, but not why more of those collisions can cause a reaction. That missing link costs the last mark.
- 03
Next rep
Rates of reaction · activation energy
0620 · targeted 3-mark question
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Returned: Chemistry · Paper 4
0620/42 · 11 June 2026
- Knowledge gapKG−4
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