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A gas which obeys gas laws exactly is hypothetical, and is known as an ideal gas (or perfect gas).

Boyle's Law, named after Robert Boyle, states that the volume occupied by a gas at constant temperature is inversely proportional to the pressure applied. In other words,

Charles Law, named after Jacques Charles, states that the pressure that a gas exerts on the walls of its container is determined by the momentum of the atomFor alternative meanings see atom (disambiguation). An atom is a microscopic structure found in all ordinary matter around us. Atoms are composed of 3 types of subatomic particles: electrons, which have a negative charge; protons, which have a positive chs and moleculeIn science, a molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. A molecule consists of multiple atoms joined by shared pairs of electrons in a covalent bond''. It may consist of atoms of the gas, which in turn is determined by the temperature. As the temperature increases the atoms and molecules move faster, and so exert a greater pressure on the walls. If the walls are rigid, such that the volume of the container is held constant, then the relationship between pressure P and temperature T is given by Charles' Law:

Graham's Law, named after Thomas GrahamThomas Graham ( December 20, 1805 September 16, 1869) was born in Glasgow, Scotland and educated at Glasgow University. He was a chemist and formulated " Graham's law" on the diffusion of gases. He has also been called the father of colloid chemistry., states that the kinetic energyKinetic energy (also called vis viva or living force is energy possessed by a body by virtue of its motion. The kinetic energy of a body is equal to the amount of work needed to establish its velocity and rotation, starting from rest. Equations Definition of two samples of different gases at the same temperature is identical.