OCR GCSE Physics B · J259
Paper 1, Paper 2
Revise: Particle Motion and Gas PressureOn average, a molecule also undergoes a greater momentum change when it rebounds, so the collisions produce a greater average force on the walls.
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GCSE Physics · key term
A change in momentum caused when a particle rebounds from a container wall.
Used by OCR
Paper 1, Paper 2
Revise: Particle Motion and Gas PressureOn average, a molecule also undergoes a greater momentum change when it rebounds, so the collisions produce a greater average force on the walls.
When explaining why heating raises gas pressure, give the complete chain: higher temperature → greater average particle kinetic energy → faster particles → more frequent wall collisions and a greater average momentum change per collision → greater average force on the walls → greater pressure.
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