Deriving the Second Virial Coefficient from Statistical Mechanics

Here we derive the general expression for the second virial coefficient starting from statistical-mechanical principles. We carefully discuss the role of pair interactions, orientation dependence, and symmetry, and explain why higher-order interactions do not contribute at this level. Special attention is given to physical interpretation and to avoiding unnecessary formalism while remaining fully rigorous. Playlist: https://youtube.com/playlist?list=PLMmzicajje3zQuyMlheCNOyJ14FzYb5NB&si=HPNNk4nLfDh2Y2z2 My Webpage: https://www.darinulness.com/learning-communities/gnl-project GNL Project Webpage: https://www.darinulness.com/learning-communities/gnl-project