A driver measures the pressure of the air inside a car tyre at different temperatures. The volume of the tyre does not change.
The Table shows the results.
Table
| Temperature of the air in ∘C^\circ\text{C}∘C | Pressure of the air in kPa\text{kPa}kPa |
|---|---|
| 0 | 220 |
| 10 | 228 |
| 20 | 236 |
| 30 | 244 |
| 40 | 252 |
Describe the pattern shown by the results.
Use the Table to predict the pressure of the air at 25 ∘C25\ ^\circ\text{C}25 ∘C.
Explain, in terms of the air particles, why the pressure increases when the temperature increases.
Drivers are told to check the pressure of their tyres before a journey, when the tyres are cold.
Suggest why.
50 exam-style questions on OCR GCSE Physics 1.3 Pressure, covering 1.3.1 Molecular motion, temperature and gas pressure, 1.3.2 Gas pressure at constant volume, 1.3.3 Compressing and expanding gases, 1.3.4 Gas volume and pressure at constant temperature, 1.3.5 Doing work on a gas, 1.3.6 The Earth's atmosphere and atmospheric pressure, 1.3.7 Atmospheric pressure and height, 1.3.8 Floating and sinking, 1.3.9 Pressure in liquids and upthrust, and 1.3.10 Pressure differences with depth. Each one has a worked solution and a mark scheme showing where the marks go.