Pressure in Gases

A series of free GCSE/IGCSE Physics Notes and Lessons.

Particle motion in gases
How particles move in gases and how this leads to gas pressure.
How the temperature of a gas is related to the kinetic energy of the particles?
How changing the temperature of a gas changes the pressure?

Pressure in gases
How particles collisions cause gas pressure?
Describe how the pressure of a gas is related to its volume.
Calculate changes in the pressure or volume of a gas.
Examples:

1. A gas has a volume of 3 m³ and a pressure of 400 000 Pa. The volume is increased to 6 m³. Calculate the pressure.
   
2. A gas has a volume of 10 m³ and a pressure of 50 000 Pa. The volume is increased to 50 m³. Calculate the pressure.
   
3. A gas has a volume of 5 m³ and a pressure of 150 000 Pa. The pressure decreases to 50 000 Pa. Calculate the volume.
   

Work done on a gas
Describe the effect of doing work on an enclosed gas.
What is meant by work done?
How compressing a gas can increase its temperature?

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