The laws which govern the behaviour of a perfect gas due to the variation in its pressure, temperature and volume are known as gas laws.
Three are three basic gas laws.
- Boyle’s law
- Charle’s law
- Gay-Lussac law
Boyle’s law: It states that when the temperature is remains constant; the volume of a perfect is inversely proportional to its absolute pressure. i.e.
V α 1/P (T is constant)
Or PV = Constant
0r P1V1 = P2V2 (when a gas changes its state from 1 to 2 at constant temperature)
Charle’s law: The volume of a perfect gas is directly proportional to its absolute temperature, if the pressure remains constant. i.e.
V α T or V/T=Constant
Or V1/T1 = V2/T2 (when a gas changes its state from 1 to 2 at constant pressure)
Gay-Lussac law: The pressure of the gas is directly proportional to its temperature if the volume remains constant. i.e.
P α T or P/T = Constant
Or P1/T1 = P2/T2 (when a gas changes its state from 1 to 2 at constant volume)