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# Boyle's law

## Description

Boyle’s law is an experimental gas law which describes how the pressure of a gas tends to decrease as the volume of a gas increases. The absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it occupies if the temperature and amount of gas remain unchanged within a closed system. The equation states that product of pressure and volume is a constant for a given mass of confined gas as long as the temperature is constant. For comparing the same substance under two different sets of condition, the law can also be expressed as: P1/P2 = V2/V1
The equation shows that, as volume increases, the pressure of the gas decreases in proportion. Similarly, as volume decreases, the pressure of the gas increases

Related formulas

## Variables

 P1 pressure of the gas under conditions 1 (N/m2) V1 volume of the gas under conditions 1 (m3) P2 pressure of the gas under conditions 2 (N/m2) V2 volume of the gas under conditions 2 (m3)