A sealed rigid container of gas is initially at −23 ∘C-23\,^\circ\mathrm{C}−23∘C. The gas is heated to 280 K and then cooled to 250 K. No gas escapes.
Which compares the final pressure with the initial pressure and gives the reason?
A lower pressure, because the final temperature is lower than the initial temperature.
A higher pressure, because the final temperature is higher than the initial temperature.
Zero pressure, because the final temperature is below the freezing point of water.
The same pressure, because the final temperature equals the initial temperature.
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.