KINETICS : POTENTIAL ENERGY OF REACTION GRAPH SLIDE#1 3/29/10 CH 17-18 100 kJ THIS LINE REPRESENTS THE POTENTIAL ENERGY CONTENT OF THE ACTIVATED COMPLEX DURING THE REACTION. 90 kJ 80 kJ THE ACTIVATED COMPLEX IS AN UNSTABLE, HIGHLY ENERGISED TRANSIENT STATE, BOTH THE FORWARD AND REVERSE REACTIONS MUST TRANSITION THROUGH THIS STATE. 70 kJ 60 kJ 50 kJ 40 kJ 30 kJ 20 kJ THIS LINE REPRESENTS THE POTENTIAL ENERGY CONTENT OF THE PRODUCTS AFTER THE REACTION. THIS LINE REPRESENTS THE POTENTIAL ENERGY CONTENT OF THE REACTANTS BEFORE THE REACTION. 10 kJ

KINETICS : POTENTIAL ENERGY OF REACTION GRAP SLIDE#2 3/2/07 100 kJ 90 kJ 80 kJ ACTIVATION ENERGY REVERSE ACTIVATION ACTIVATED COMPLEX P.E. 70 kJ 60 kJ REACTANTS P.E. 50 kJ 40 kJ 30 kJ PRODUCTS P.E. 20 kJ 10 kJ

KINETICS : POTENTIAL ENERGY OF REACTION GRAPH 3/2/07 Sum of P.E. reactants and forward activation energy = activated complex Sum of P.E. products and reverse activation energy = activated complex 100 kJ 90 kJ 80 kJ ACTIVATION ENERGY REVERSE ACTIVATION ACTIVATED COMPLEX P.E. 70 kJ 60 kJ REACTANTS P.E. 50 kJ 40 kJ 30 kJ PRODUCTS P.E. 20 kJ 10 kJ

KINETICS : POTENTIAL ENERGY OF REACTION GRAPH SLIDE#4 3/2/07 100 kJ FORWARD ACTIVATION WITH CATALYST 90 kJ 80 kJ ACTIVATION ENERGY ACTIVATED COMPLEX P.E. REVERSE ACTIVATION REVERSE ACTIVATION WITH CATALYST ACTIVATED COMPLEX P.E. CATALYZED 70 kJ 60 kJ REACTANTS P.E. 50 kJ 40 kJ 30 kJ PRODUCTS P.E. 20 kJ 10 kJ

KINETICS : POTENTIAL ENERGY OF REACTION GRAPH SLIDE 5 3/2/07 100 kJ 90 kJ 80 kJ ACTIVATION ENERGY REVERSE ACTIVATION ACTIVATED COMPLEX P.E. 70 kJ 60 kJ ∆H(-) HEAT OF REACTION 50 kJ 40 kJ 30 kJ PRODUCTS P.E. 20 kJ 10 kJ

KINETICS : POTENTIAL ENERGY OF REACTION GRAPH SLIDE 6 3/2/07 100 kJ 90 kJ 80 kJ ACTIVATED COMPLEX P.E. ACTIVATION ENERGY ACTIVATION REVERSE 70 kJ 60 kJ PRODUCTS P.E. ∆H(+) HEAT OF REACTION 50 kJ 40 kJ 30 kJ REACTANTS P.E. 20 kJ 10 kJ

U DO IT NOW – PRACTICE IN GROUPS 1) What is the value of ∆H (kJ) in the reaction shown in the slide #1, show draw the curve and show arrows. 2) What is the value of THE FORWARD AND REVERSE ACTIVATION ENERGY (kJ) IN SLIDE #1, show arrow addition equalities. 3) What is the value of THE ACTIVATED COMPLEX ENERGY LEVEL (kJ) IN SLIDE #1, show arrow addition equalities. 4) What is the value energy difference between the activation energy and catalyzed activation energy IN SLIDE #4.