Consider the reaction in which HCl and ethene (CH2CH2) react to produce chloroethane (CH3CH2Cl). HCl + CH2CH2 → CH3CH2Cl A mechanism and energy diagram have been proposed for this reaction: Step 1  HCl + CH2CH2 → CH3CH2+ + Cl− Step 2  CH3CH2+ + Cl− → CH3CH2Cl Are there any intermediates in this mechanism? If so, what are they? If not, how do you know? Based on the energy diagram, decide which step of the mechanism is the rate-determining step? Considering both the proposed mechanism and the energy diagram, what is the rate law for the reaction? (You do not need to find the value of k.) Is the overall reaction exothermic or endothermic? How do you know?

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. Consider the reaction in which HCl and ethene (CH2CH2) react to produce chloroethane (CH3CH2Cl).

HCl + CH2CH2 → CH3CH2Cl

A mechanism and energy diagram have been proposed for this reaction:

Step 1  HCl + CH2CH2 → CH3CH2+ + Cl

Step 2  CH3CH2+ + Cl → CH3CH2Cl

  1. Are there any intermediates in this mechanism? If so, what are they? If not, how do you know?
  2. Based on the energy diagram, decide which step of the mechanism is the rate-determining step?
  3. Considering both the proposed mechanism and the energy diagram, what is the rate law for the reaction? (You do not need to find the value of k.)
  4. Is the overall reaction exothermic or endothermic? How do you know?

 

- Ea2
Ea I
ΔΗ,
rxn
C=C + HCI
H-C-C-Cl
Reaction progress >
0 2018 Pearson Education, Inc.
Energy
Transcribed Image Text:- Ea2 Ea I ΔΗ, rxn C=C + HCI H-C-C-Cl Reaction progress > 0 2018 Pearson Education, Inc. Energy
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