●a Chapter VI Interaction between Molecules,2 (5)Intermolecular potential energy B E attr s 6 R rep (n=8-16) R 2021821 Chemistry Departme nt of Fudan UniversityPhysical ChemistryI Chapter VI Interaction between Molecules 2021/8/21 Chemistry Department of Fudan University 10 (5) Intermolecular potential energy attr 6 B E R = − rep n A E R = (n=8-16)