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igcse physics notesprinted 74 · PDF 74
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74
Pressure in Gases and Particle Collisions
Gas particles collide with container walls, exerting force; pressure is this force per unit
area.Faster Moving particles (higher temperatures) result in more frequent, forceful
collisions, increasing pressure.
Gas Laws:
PressureVolume Relationship (Boyle’s Law): At constant temperature, increasing gas
volume reduces pressure, and vice versa. So Pressure is Inversely proportional to
volume . An equations formed is :
P1V1 = P2V2
PressureTemperature Relationship (Constant Volume): At fixed volume, higher
temperature raises pressure due to more energetic collisions.