CAIE A Level Chemistry 9701 · States of matter
An ideal gas is a model used to describe the behaviour of gases.
Compare an ideal gas with a real gas in terms of the volume of the particles and the forces between the particles.
Explain why an ideal gas exerts pressure on the walls of its container, and why an ideal gas can never be turned into a liquid by cooling.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.