# Explain why increasing the temperature of a reaction mixture increases the rate of a chemical reaction.

> IB DP Chemistry Standard Level (2023 syllabus) — R2.2 How fast? The rate of chemical change · Explain · 4 marks

## Mark scheme (4 marks)

1. Higher temperature means particles have greater average kinetic energy / move faster on average
2. Particles collide more frequently because they are moving faster
3. A greater proportion of collisions have energy equal to or greater than the activation energy
4. Therefore the rate of successful collisions increases, so the rate of reaction increases

## Related

- [Revision notes for IB DP Chemistry Standard Level (2023 syllabus)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
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