Boyle's Law

Key Stage 5

Meaning

Boyle’s Law states that for a fixed mass of gas at constant temperature, the product of its pressure and volume is constant.

About Boyle's Law

• Expressed mathematically as 𝑃×𝑉=constant
• Describes the inverse relationship between the pressure and volume of a gas.
• Assumes ideal gas behaviour.
• Applicable in various real-world scenarios such as breathing and syringes.

Formula

𝑃×𝑉=constant

Where:

𝑃 is pressure

and

𝑉 is volume

Examples

• Compressing a gas in a piston decreases its volume and increases its pressure.
• In scuba diving, the pressure of air in tanks decreases as the diver uses the air and the volume increases.