A driver adjusts a car tyre to its recommended pressure before a long journey. No air enters or leaves the tyre during the journey. Assume that the volume and inner surface area of the tyre remain constant.
| Measurement | Temperature of air in tyre (°C) | Pressure reading (kPa) |
|---|---|---|
| Before the journey | 16 | 220 |
| Immediately after the journey | 46 | 245 |
Explain, using the particle model, why the pressure reading changes during the journey.
The driver proposes releasing air until the pressure reading is 220 kPa immediately after the journey.
Explain whether the driver should do this.
108 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.