Linked from
The 15 pages that link to Virial expansion, each with the reason it gives.
Real gasRelated: Its coefficients encode molecular interactions underlying nonideal behavior.
Compressibility factorRelated: Its density expansion expresses Z through virial coefficients.
Gas lawsCompared with: Offers a systematic alternative to the ideal gas equation for nonideal gases.
Amagat's lawRelated: Its mixture corrections help assess errors in Amagat-based volume estimates.