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A catalyst decreases the activation energy of a particular exothermic reaction by 33 kJ/mol, to 25 kJ/mol. Assuming that the mechanism has only one step, and that the products are 55 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions. What is the activation energy for the uncatalyzed reverse reaction? Answer:

A catalyst decreases the activation energy of a particular exothermic reaction by 33 kJ/mol, to 25 kJ/mol. Assuming that the mechanism has only one step, and that the products are 55 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions. What is the activation energy for the uncatalyzed reverse reaction? Answer:

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Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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1)A A catalyst decreases the activation energy of a particular exothermic reaction by 33 kJ/mol, to 25 kJ/mol. Assuming that the mechanism has only one step, and that the products are 55 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions. What is the activation energy for the uncatalyzed reverse reaction? Answer: 2) F For the reaction A+B+C, when the natural log of [A] is plotted versus the time in seconds a straight line is obtained whose slope is -0.034 s¹. What is the concentration of A (in M) after 44.0 s if [A] = 0.20 M? Answer: 3) For the reaction D→ A+ C when 1/[D] is plotted versus the time in seconds, a straight line is obtained whose slope is 0.042 M's". What is the concentration of D (in M) after 63.0 s if [D], 0.50 M? Hint given in feedback Answer:
Transcribed Image Text:1)A A catalyst decreases the activation energy of a particular exothermic reaction by 33 kJ/mol, to 25 kJ/mol. Assuming that the mechanism has only one step, and that the products are 55 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions. What is the activation energy for the uncatalyzed reverse reaction? Answer: 2) F For the reaction A+B+C, when the natural log of [A] is plotted versus the time in seconds a straight line is obtained whose slope is -0.034 s¹. What is the concentration of A (in M) after 44.0 s if [A] = 0.20 M? Answer: 3) For the reaction D→ A+ C when 1/[D] is plotted versus the time in seconds, a straight line is obtained whose slope is 0.042 M's". What is the concentration of D (in M) after 63.0 s if [D], 0.50 M? Hint given in feedback Answer:
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