A student investigates the effect of temperature on the pressure of a fixed mass of gas. The student uses a sealed syringe with a freely moving plunger. On heating, the plunger moves outwards and the pressure changes very little. Which change would allow the intended relationship to be investigated?
Open the outlet so that the gas pressure remains constant.
Add more gas so that the particle number increases steadily.
Clamp the plunger so that the gas volume remains constant.
Remove the seal so that the particle number decreases steadily.
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.