理想的Gas Law describes the behavior of a real gas with a density low enough or temperature high enough that it is far from liquefaction. The Ideal Gas Law can be expressed forIdeal Gasesas follows:

pV = Nk_RT

where p is the absolute pressure of a gas,

V is the volume it occupies,

N is the number of molecules in the gas,

T is its absolute temperature,

and k_Ris theBoltzmann constant.