Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)
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This question is 4 marks so you need to make at least 4 points.
These types of questions just require memorising the 4 points:
Lots of molecules collide with the walls.
The molecules change momentum as they collide with the walls.
Force is the rate of change of momentum.
Pressure = force/area.
Remember these 4 points and you'll get full marks for the question.
