A materials-testing machine has two identical sealed cylinders fitted with freely moving pistons. One cylinder contains air and the other contains liquid water. The temperature remains constant as the pressure applied to each piston is increased.
| sample | volume at 100 kPa in cm3\mathrm{cm^3}cm3 | volume at 1000 kPa in cm3\mathrm{cm^3}cm3 |
|---|---|---|
| air | 50.00 | 5.00 |
| liquid water | 50.00 | 49.98 |
Explain the different changes in volume shown in the table.
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.