Introduction H. H ·Reactants-→Products:overall reaction. Mechanism:step-by-step pathway. To learn more about a reaction: >Thermodynamics Kinetics. => Chapter 4 2Chapter 4 2 Introduction • Reactants → Products: overall reaction. • Mechanism: step-by-step pathway. • To learn more about a reaction: ➢Thermodynamics ➢ Kinetics. =>