A gas is enclosed in a cylinder fitted with a frictionless, movable piston. The gas is heated, causing it to expand at a constant pressure. What is the effect on the average speed of the gas particles and the average distance between them?
Average speed of gas particles decreases, average distance between gas particles stays the same.
Average speed of gas particles increases, average distance between gas particles increases.
Average speed of gas particles increases, average distance between gas particles stays the same.
Average speed of gas particles stays the same, average distance between gas particles increases.
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.