Draw an energy diagram for each reaction. Label the axes, the starting material, product, transition state, ΔH∘, and Ea.
a. A concerted, exothermic reaction with a low energy of activation.
b. A one-step endothermic reaction with a high energy of activation.
c. A two-step reaction, A→B→C, in which the relative energy of the compounds is A<C<B, and the step A→B is rate-determining.
d. A concerted reaction with ΔH∘=−80kJ/mol and Ea=16kJ/mol.