A gas, in a sealed container, is allowed to expand slowly so that its temperature does not change.
What happens to the molecules of the gas as a result of this expansion?
The average kinetic energy of the molecules decreases.
The average force exerted by a molecule during a collision with the container walls decreases.
There are less frequent collisions between the molecules and the container walls.
The volume of each individual molecule 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.