Types of Catalysts 1. Transition Metals in the Hydrogenation Reaction. Describe the effect a catalyst has on Energy diagram and on the number of effective collisions. A catalyst will lower the energy of activation and improve the orientation of the colliding molecules leading to more effective collisions. Describe the molecular view of a heterogeneous catalyst.
Substrate molecules attach themselves to the surface of the catalyst called the active site.
Bonds are then broken and reformed to produce product. Then the product molecules will disengage from the active site to vacate the site for more substrate molecules to occupy the site. Define enzymes and the Model of enzyme activity. The active site will have little tolerance in accepting most molecules except the substrate it was designed to catalyze.