23.
Draw a potential energy versus reaction coordinate diagram for areaction which occurs by a three-step mechanism where the secondstep is the rate-determining step for the forward reaction. On yourdiagram, indicate:
i. The energy of the reactants and of the products. ii. Theenthalpy change for the reaction.
iii. The activation energy for the forward and reverse direction ofeach step.
(a)For the diagram you drew in Part a, justify why the second stepyou show in your diagram is the rate-determining step for theforward reaction.
(b)For the diagram you drew in Part a, is the overall reactionendothermic, exothermic, neither, or cannot be determined? Justifyyour choice.
(c)Redraw you diagram from Part a and clearly on the diagram showthe effect of adding a catalyst which increases the reaction rate.
23.
Draw a potential energy versus reaction coordinate diagram for areaction which occurs by a three-step mechanism where the secondstep is the rate-determining step for the forward reaction. On yourdiagram, indicate:
i. The energy of the reactants and of the products. ii. Theenthalpy change for the reaction.
iii. The activation energy for the forward and reverse direction ofeach step.
(a)For the diagram you drew in Part a, justify why the second stepyou show in your diagram is the rate-determining step for theforward reaction.
(b)For the diagram you drew in Part a, is the overall reactionendothermic, exothermic, neither, or cannot be determined? Justifyyour choice.
(c)Redraw you diagram from Part a and clearly on the diagram showthe effect of adding a catalyst which increases the reaction rate.
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