Edexcel IGCSE Physics 5.15 Gas pressure
Practise explaining gas pressure from random molecular motion, wall collisions, force and pressure readings in containers.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- explain how gas particles colliding with walls produce force and pressure
- link random motion to equal collision rates and equal pressure on container walls
- read or determine a pressure gauge value in kPa from a diagram
5.15 Gas pressure question 1
This question is about gas pressure.
Diagram 1 shows some of the molecules of a gas in a sealed container.
Diagram 1
The molecules collide with all the surfaces of the container. This exerts an outward force on the container and causes pressure.
Describe how the motion of the gas molecules causes an equal pressure on all the walls of the container.
You may add to diagram 1 to help your answer.
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