A gas in a sealed container is allowed to expand slowly so that its temperature remains constant.
What happens to the molecules of the gas as a result of this expansion?
The average speed of the molecules decreases.
The average force exerted during a single collision between a molecule and the container increases.
There are less frequent collisions between molecules and the container.
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.