Energy Diagrams: Graphical representation of reaction energetics in proceeding from reactants to products.
Y Axis: Represents the total potential energy of all species involved in the reaction.
X Axis: Described as the reaction coordinate or “progress of reaction”. Symbolizes the progress of the reaction in going from reactants to products.
Transition State: highest point on graph. Represents the highest energy state in a molecular collision that leads to a reaction. It is highly unstable and cannot be isolated. It is symbolized by a “double dagger” (‡).
Ea: Energy difference between the reactants and the transition state.
?H: The heat of the reaction. Represents the difference in energy between the reactants and the products.