A sealed rigid capsule contains a fixed mass of gas. The capsule is warmed.
Which statement explains why the pressure of the gas in the capsule increases?
The particles move faster, so they hit the walls more often and each collision exerts a larger force.
The particles expand as they gain energy, so they hit the walls more often and with a larger force.
The particles move faster and collide with each other more often, so they push each other onto the walls.
The particles move faster, so they hit the walls more often, but each collision exerts the same force.
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.