Question

Why do gas laws apply only to gases? Why don't they apply to solids or liquids?

Answer 1

Gas laws apply only for gases:

1. A group of laws which deals with the behaviour of gases that relate the pressure, volume and temperature of a gas is called as the gas laws.
2. The ideal gas laws is expressed by simpler gas laws such as Boyle's law, Charles's law, Avogadro's law and Amon ton's law.
3. Ideal gas law which is also termed as perfect gas law deals with the pressure P, volume V, and temperature T of a gas in the limit of low pressures and high temperatures.
4. They are applicable only to the gases as the behaviour of the ideal gas is interpretable.
5. The particles in the gas are very small, so they do not occupy any space.
6. The ideal gas has constant, random and straight line motion.
7. The gas particles travel randomly and the elastic collision also occurs randomly.

Gas laws do not apply for solids and liquids as:

1. The gas laws apply only for ideal gases.
2. By nature, gases are different from solids and liquids.
3. The intermolecular attraction is present between the solids and liquids.
4. The intermolecular attraction in them provides their characteristic shape and properties.
5. Thus, gas laws are not applicable for solids and liquids.