CHE 1302 Lecture Notes - Lecture 7: Transition State Theory, Activated Complex, Collision Frequency
Document Summary
Baker | che 1302 | summer 2017 | lecture 7 | page 1. Collision theory isn"t competing with transition state theory: not one"s more right than the other. Just two ways of approaching the same problem. Kind of like part 2 of collision theory. In effect, the activation energy converts reactants into activated complexes which then turn into products: the transition state exists at the top of a hill in the in-between state for zero time. The half-way house between successfully creating a product or failing and returning to reactants: usually succeed if you get to this point. We will illustrate how potential energy changes during the reaction using a reaction profile: activation energy is always positive (even for the reverse reaction, (cid:4666)(cid:3033)(cid:3045)(cid:3050)(cid:3045)(cid:3031)(cid:4667)=(cid:1831)(cid:4666)(cid:3033)(cid:3045)(cid:3050)(cid:3045)(cid:3031)(cid:4667) (cid:1831)(cid:4666)(cid:3045)(cid:3032)(cid:3049)(cid:3032)(cid:3045)(cid:3046)(cid:3032)(cid:4667) Baker | che 1302 | summer 2017 | lecture 7 | page 2. Reactions are generally faster at higher temperatures because more molecules have kinetic energy.
