<Dd> Z = z N N! with z = V Λ 3 (\ displaystyle Z = (\ frac (z ^ (N)) (N!)) \ quad (\ hbox (with)) \ quad z = (\ frac (V) (\ Lambda ^ (3)))) </Dd> <P> where Λ (\ displaystyle \ Lambda) is the thermal de Broglie wavelength, </P> <Dl> <Dd> Λ = h 2 2 π m k T (\ displaystyle \ Lambda = (\ sqrt (\ frac (h ^ (2)) (2 \ pi mkT)))) </Dd> </Dl> <Dd> Λ = h 2 2 π m k T (\ displaystyle \ Lambda = (\ sqrt (\ frac (h ^ (2)) (2 \ pi mkT)))) </Dd>

Significance of vander wall constant a and b