Edexcel IGCSE Physics 5.20 Gas Pressure Relationships Questions

Practise comparing a fixed amount of gas as volume or kelvin temperature changes, including particle spacing, wall-collision frequency and pressure graphs.

Exam points

For a fixed gas at constant temperature, link larger volume to fewer wall collisions and lower pressure.
At constant volume, link higher kelvin temperature to faster particles, harder collisions and higher pressure.
Interpret pressure–temperature graphs: linear in °C but not proportional; proportional in kelvin.
Explain how cooling a sealed can lowers internal pressure so external pressure crushes it.

[Maximum number: 3]

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

Figure for Question Edexcel IGCSE Physics 5.20 Gas Pressure Relationships Questions question 1 — Edexcel IGCSE Physics

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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Edexcel IGCSE Physics 5.20 Gas Pressure Relationships Questions question 1