Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)
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.
JF
Related Physics A Level answers
All answers ▸How might you use sound waves to smash a glass? What are other examples of resonance in everyday life?
describe how a microwave oven works (EM waves + thermal physics)
Explain in terms of the motion of the molecules of the gas why the volume of gas must increase if the pressure is to remain constant as the gas is heated.
Compare and contrast elastic and inelastic collisions