This lecture explores the influence of temperature on reaction rates, focusing on the Arrhenius equation and activation energy. It delves into the concept of collision efficiency, reaction mechanisms, and catalysis, both homogeneous and heterogeneous. The Haber-Bosch process for ammonia synthesis is discussed, along with the role of catalysts in accelerating reactions. The lecture also covers enzymatic catalysis and the mechanisms behind ammonia biosynthesis by bacterial nitrogenase.