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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:

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter13: Chemical Kinetics
Section: Chapter Questions
Problem 13.67QE
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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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