Gas laws are laws that explain the behaviour of an ideal gas. The following are some of the important gas laws:
Boyle’s law states that the volume of a given mass of gas (V) is inversely proportional to its absolute pressure (P), provided the temperature of the gas (T) remains constant.
According to Boyle’s law,
According to Charles’ law, the volume of a given mass of gas (V) is directly proportional to its absolute temperature (T), when its pressure remains constant.
Amontons’ law states that if the volume of a given mass of a gas (V) is kept constant, then the pressure of the gas (P) is directly proportional to its absolute temperature (T).
According to this law,
Joule’s law of internal energy states that the internal energy of a given quantity of gas depends only on its temperature and is independent of its pressure and volume.
i.e, ΔU ∝ T
where ΔU → Change in internal energy
Regnault’s law states that the specific heat capacity of a gas at constant pressure (Cp) and the specific heat capacity of a gas at constant volume (Cv) do not change with change in pressure and temperature. According to this law, Cp and Cv values of a gas remain constant.
This law states that equal volumes of different perfect gases, at the same temperature and pressure, contain equal number of molecules.
According to Avogadro’s law,
V → Volume of gas
n → Amount of substance of the gas