# A fixed amount of gas is trapped inside a rigid container. Explain, in terms of gas particles, why the pressure of the gas increases when the temperature of the gas is increased.

> Eduqas GCSE Physics — 2.2 The kinetic theory and gas pressure · Explain · 4 marks

## Mark scheme (4 marks)

1. Increasing temperature increases the average kinetic energy (or speed) of the gas particles
2. Particles collide with the walls of the container more frequently
3. Each collision exerts a greater force on the walls (particles hit the walls harder)
4. Greater force per unit area on the walls means higher pressure (volume is constant so pressure increases)

## Key terms

- [pressure](https://www.gradenine.co.uk/glossary/pressure)
- [temperature](https://www.gradenine.co.uk/glossary/temperature)

## Related

- [Revision notes for Eduqas GCSE Physics](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/a-fixed-amount-of-gas-is-ed808670) · Published by Druglandscape Ltd.