IGCSE Physics / Solids, liquids and gases

Gas pressure and molecules revision notes

Edexcel International GCSE Physics (4PH1), chapter 19: Solids, liquids and gases, specification point 5.15. Part of the full course.

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Gas molecules create pressure when they collide with the walls of their container and exert a force. Pressure increases when these collisions happen more often or are harder.

More lessons in Solids, liquids and gases

• Particles in solids, liquids and gases
• Changes of state: melting, evaporating and boiling
• Practical: a temperature-time graph for a change of state
• Specific heat capacity
• Practical: measuring specific heat capacity
• Absolute zero and the Kelvin scale
• Temperature and the speed of gas molecules
• Pressure and temperature of a gas
• Pressure and volume of a gas