Chemistry 1301A/B Lecture Notes - Lecture 27: Activated Complex, Endothermic Process, Rate Equation
31 Aug 2017
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Document Summary
Potential energy versus the progress of the reaction, is another useful illustration tool that shows the progression of a chemical reaction, and its associated energy. The main features of this diagram are: the enthalpy ( h), the ea (both forward and reverse directions, the transition state (with the associated activated complex, the effect of a catalyst. The transition state is the highest point on the diagram and the configuration of atoms at this point is called the activated complex, which is an intermediate between reactants and products. This highest point is also the forward ea, and it is higher for slower reactions as there are very few reactants that have sufficient energy for a successful reaction. The transition state can be considered a tipping point- if the reactants have enough energy to overcome ea, they roll forward down the hill and form products, otherwise they roll backwards , remaining as reactants. Potential energy profiles for an exothermic and endothermic reaction.
