Behaviour of Perfect Gases and Kinetic Theory of Gases

An idealised gas that obeys Boyle's

An idealised gas that obeys Boyle's law, Charles' law, and the law of pressure exactly. Its molecules are taken as infinitesimally small and there is

For a given sample

For a given sample, PV/T remains constant. For n molecules, PV = nkT. For 1 mole, PV = RT. For μ moles, PV = μRT. Here R is the universal gas constant

R is the gas constant

R is the gas constant for 1 mole of any gas. Its value is 8.31 J mol⁻¹ K⁻¹.

k = 1

k = 1.38×10⁻²³ J K⁻¹. It is the gas constant per molecule and appears in PV = nkT and in average kinetic energy per molecule.

Gas molecules move rapidly in straight

Gas molecules move rapidly in straight lines in all possible directions and collide constantly with one another and with the walls. Collisions are per