IGCSE Physics / Solids, liquids and gases

Pressure and temperature of a gas

Edexcel International GCSE Physics (4PH1), chapter 19: Solids, liquids and gases, specification point 5.20, 5.21. Part of the full course.

Read the revision notes · IGCSE Physics past papers

At constant volume, heating a gas raises its pressure because its molecules move faster and collide with the walls more often and harder. The relationship between pressure and temperature lets you calculate a new value, as long as both temperatures are in kelvin.

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
• Gas pressure and molecules
• Absolute zero and the Kelvin scale
• Temperature and the speed of gas molecules
• Pressure and volume of a gas