The ideal gas law can also be expressed as PV=13Nm¯v2, where P is the pressure (average force per unit area), V is the volume of gas in the container, N is the n...The ideal gas law can also be expressed as PV=13Nm¯v2, where P is the pressure (average force per unit area), V is the volume of gas in the container, N is the number of molecules in the container, is the mass of a molecule, and ¯v2 is the average of the molecular speed squared.