particular total energy / chemical potential / gas properties / gas particle / pure gas / free energy change / pure-component chemical potential / gas mixture / gas particles / nonideal gas / gas molecules / energy spectrum / free energy / kinetic energy / gas mixture pressures / baseline chemical potential / gas entropy / energy range / energy conservation equation / gas mixtures / constant total energy / thermal energy scale / gas molecule / diatomic gas / potential energy / gas species / energy / gas law / /