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

> Cambridge International IGCSE Chemistry (0620) — 6.2 Rate of reaction · Explain · 4 marks

> A student notices that hydrogen peroxide solution decomposes much more quickly when it is warmed than when it is kept in a cool cupboard.

## Mark scheme (4 marks)

1. Particles move faster / have more kinetic energy at higher temperature
2. Particles collide more frequently / there are more collisions per unit time
3. A greater proportion of collisions have energy equal to or greater than the activation energy
4. Therefore more product is formed per unit time / the rate of reaction increases

## Related

- [Revision notes for Cambridge International IGCSE Chemistry (0620)](https://www.gradenine.co.uk/learn)
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