A sealed, rigid steel canister contains a fixed volume of gas. When the canister is heated, the pressure of the gas inside increases.
What is the primary cause of this increase in pressure?
The gas molecules expand and take up more space.
The gas molecules move faster, colliding more frequently and with more force against the canister walls.
The total number of gas molecules inside the canister increases.
The volume of the canister decreases, compressing the gas.
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.