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a.) Would you expect this reaction to take place in a single step? Why or why not? b.) This reaction is thought to take place by means of the following mechanism: Step 1: HBr + O2 HOOBI (slow) Step 2: HBr + HOOBr 2 HOBr (fast) Step 3: 2 HBr + 2 HOBT 2 H20 + 2 Br2 (fast) i. Identify the two intermediates. ii. Which step has the greatest activation energy? ii. How many "peaks" will the potential energy diagram for the reaction mechanism have? iv. Which step is called the rate determining step in this mechanism?

a.) Would you expect this reaction to take place in a single step? Why or why not? b.) This reaction is thought to take place by means of the following mechanism: Step 1: HBr + O2 HOOBI (slow) Step 2: HBr + HOOBr 2 HOBr (fast) Step 3: 2 HBr + 2 HOBT 2 H20 + 2 Br2 (fast) i. Identify the two intermediates. ii. Which step has the greatest activation energy? ii. How many "peaks" will the potential energy diagram for the reaction mechanism have? iv. Which step is called the rate determining step in this mechanism?

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter14: Chemical Kinetics: The Rates Of Chemical Reactions
Section: Chapter Questions
Problem 93SCQ: The following statements relate to the reaction for the formation of HI: H2(g) + I2(g) 2 HI(g)Rate...
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Given the reaction: 4 HBr+ 02 2 H20+2 Br a.) Would you expect this reaction to take place in a single step? Why or why not? b.) This reaction is thought to take place by means of the following mechanism: Step 1: HBr + O2 HOOBR (slow) Step 2: HBr + HQOBr 2 HOBI (fast) Step 3: 2 HBr +2 HOBr 2 H2O + 2 Br2 (fast) i. Identify the two intermediates. ii. Which step has the greatest activation energy? ii. How many "peaks" will the potential energy diagram for the reaction mechanism have? iv. Which step is called the rate determining step in this mechanism? v. In order to have successful collisions, the colliding particles must have both the proper amount of energy and the proper (fill in blank)? vi. On the set of axes below, draw the shape of the curve you might expect for the reaction in this question. The overall reaction is exothermic. Enthalpy Progress of Reaction c.) A catalyst is discovered which increases the rate of Step 3. How will this affect the rate of the overall reaction? Explain your answer. d.) A catalyst is discovered which increases the rate of Step 1. How will this affect the rate of the overall reaction? Explain your answer.
Transcribed Image Text:Given the reaction: 4 HBr+ 02 2 H20+2 Br a.) Would you expect this reaction to take place in a single step? Why or why not? b.) This reaction is thought to take place by means of the following mechanism: Step 1: HBr + O2 HOOBR (slow) Step 2: HBr + HQOBr 2 HOBI (fast) Step 3: 2 HBr +2 HOBr 2 H2O + 2 Br2 (fast) i. Identify the two intermediates. ii. Which step has the greatest activation energy? ii. How many "peaks" will the potential energy diagram for the reaction mechanism have? iv. Which step is called the rate determining step in this mechanism? v. In order to have successful collisions, the colliding particles must have both the proper amount of energy and the proper (fill in blank)? vi. On the set of axes below, draw the shape of the curve you might expect for the reaction in this question. The overall reaction is exothermic. Enthalpy Progress of Reaction c.) A catalyst is discovered which increases the rate of Step 3. How will this affect the rate of the overall reaction? Explain your answer. d.) A catalyst is discovered which increases the rate of Step 1. How will this affect the rate of the overall reaction? Explain your answer.
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