Ch ical chemistr Reaction Kinetic Potential-Energy surfaces The hard-sphere collision theory does not give accurate rate constants In chemical reactions. bonds are being formed and broken Intramolecular forces Forces acting on atoms in the molecules Intermolecular forces Consider two molecules to form a d supermolecule single quantum-mechanical entit Only exists during collision9 Physical Chemistry Potential-Energy Surfaces The hard-sphere collision theory does not give accurate rate constants. In chemical reactions, bonds are being formed and broken. Forces acting on atoms in the molecules Intramolecular forces Intermolecular forces Consider two molecules to form a single quantum-mechanical entity supermolecule Only exists during collision Reaction Kinetics