A student investigates how the pressure of a fixed mass of air changes when its volume changes. The temperature of the air stays the same.
The Table shows her results.
Table
| Volume of air in cm3\text{cm}^3cm3 | Pressure of air in kPa\text{kPa}kPa |
|---|---|
| 50 | 100 |
| 40 | 125 |
| 30 | 150 |
| 25 | 200 |
| 20 | 250 |
One of the pressure readings is anomalous.
Use calculations to identify the anomalous reading.
Calculate the pressure the student should have recorded at a volume of 30 cm3.
Suggest one reason why the reading at 30 cm3 was lower than expected.
Predict the pressure of the air when its volume is 10 cm3.
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.