5039

(a) Draw an energy profile diagram for the sequence

by using the energy values for each step given below. Mark the positions of A,B,C, and D on your diagram.

(b) Indicate the rate-controlling step in the sequence.

(c) Determine the value of ∆G° for the overall reaction.

5058

Illustrate the difference in behavior of 2-bromo-2-methylpropane and ethyl bromide toward hydroxide ion by use of a potential energy diagram.

5220

Describe the type of reaction that would be characterized by the following potential energy curve (exothermic or endothermic) and label the features marked in the drawing by boxes.