Energy (kJ) Energy (kJ) Why do catalysts increase reaction rate? Catalyst Effect on Reaction Path Examples. Catalytic Convertors Reactants Products Interpret the following potential energy diagrams (reaction coordinate diagrams) Reaction 1 Reaction 2 450T B. A+B Time Reaction coordinate, A B A + B → C 1. Which reaction is endothermic? 2. What is the activation energy of Reaction 1? 3. What is the AHrxn of reaction 1? 4. What is the activation energy of reaction 2? 5. What is the AHnn of reaction 2? 6. Sketch the effect of a catalyst on both reactions 7. Does a catalyst effect the AHrn?

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