Edexcel IGCSE Physics 5.20 Gas Pressure Relationships Questions

Practise gas pressure relationships by linking volume or temperature changes to particle speed, collision frequency and force per unit area.

Exam points

Explain lower pressure at larger volume using longer gaps between wall collisions.
Link higher kelvin temperature to faster particles and a greater force per unit area.
Use control variables such as fixed mass, constant volume or constant temperature.

[Maximum number: 3]

The diagram shows a manometer, a device used for measuring differences in pressure.

The temperature and pressure of the trapped gas increase when it is warmed.

Explain, in terms of particles, why the pressure of the trapped gas increases.

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