Table shows the pressure of a fixed mass of gas at constant volume, measured at five temperatures.
Table: the pressure of a fixed mass of gas at constant volume, measured at five temperatures
| Temperature in ∘C^\circ\text{C}∘C | Pressure in kPa |
|---|---|
| -20 | 92 |
| 0 | 100 |
| 20 | 108 |
| 40 | 115 |
| 60 | 123 |
Determine the mean increase in pressure for each 20 ∘C20\ ^\circ\text{C}20 ∘C rise in temperature.
Estimate the pressure of the gas at a temperature of 100 ∘C100\ ^\circ\text{C}100 ∘C.
A student concludes that the pressure of the gas is directly proportional to the temperature of the gas in ∘C^\circ\text{C}∘C. Use Table 1 to explain why this conclusion is wrong.
40 exam-style questions on AQA GCSE Physics 3.3 Particle model and pressure, covering 3.3.1 Particle motion in gases, 3.3.2 Pressure in gases, and 3.3.3 Increasing the pressure of a gas (HT only). Each one has a worked solution and a mark scheme showing where the marks go.