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Ch.14 - Chemical Kinetics
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All textbooksTro 4th EditionCh.14 - Chemical KineticsProblem 95a

Chapter 14, Problem 95a

Consider this energy diagram:

a. How many elementary steps are involved in this reaction?

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Welcome back everyone in this example, we need to identify the number of elementary steps of the mechanism that is represented by the energy diagram below. When it comes to identifying elementary steps for a reaction, we should recall that for each peak in our diagram that would represent an elementary step. And so we want to count each peak in our graph below. So we would see that we have our first peak here, so this is our first elementary step, we have a second peak here, and then a third peak here. And so we would say that therefore we have a total of three peaks Which will correspond to three elementary steps for our reaction. And so our final answer is going to be three elementary steps are represented in the diagram. So I hope that everything I explained was clear. If you have any questions, leave them down below and I will see everyone in the next practice video.
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Consider the reaction in which HCl adds across the double bond of ethene: HCl + H2C=CH2 → H3C-CH2Cl The following mechanism, with the accompanying energy diagram, has been suggested for this reaction:

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Textbook Question

Consider the reaction in which HCl adds across the double bond of ethene: HCl + H2C=CH2 → H3C-CH2Cl The following mechanism, with the accompanying energy diagram, has been suggested for this reaction:

Step 1 HCl + H2C=CH2 → H3C=CH2+ + Cl-

Step 2 H3C=CH2+ + Cl- → H3C-CH2Cl

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