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Chapter 6: Q20E (page 181)

Draw an energy diagram for a one-step reaction with Keq<1. Label the parts of the diagram corresponding to reactants, products, transition state, 螖骋o, and螖骋# . Is螖骋o positive or negative?

Short Answer

Expert verified

An energy profile diagram is a plot of energy against the reaction coordinate. This shows when the reaction proceeds how the energy of the reactant and product changes.

Step by step solution

01

Energy profile diagram

An energy profile diagram is a plot of energy against the reaction coordinate. This shows when the reaction proceeds how the energy of the reactant and product changes.

02

Step 2: Relation between Keq and exergonic reaction

When Keqgreater than 1 then the energy is out in the reaction which means the reaction is exergonic.

When Keqless than 1 is then the energy is in the reaction which means the reaction is endergonic.

If Keq< 1 then 螖骋ois positive.

03

Energy profile diagram showing Keq < 1

If Keq< 1 then 螖骋ois positive as shown in the following diagram

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Most popular questions from this chapter

Which of the following species are likely to be nucleophiles and which electrophiles? Which might be both?

Add curved arrows to the following polar reactions to indicate the flow of electrons in each:

(a)

(b)

Look at the following energy diagram:

(a) Is 螖骋ofor the reaction positive or negative? Label it on the diagram.

(b) How many steps are involved in the reaction?

(c) How many transition states are there? Label them on the diagram.

2-Chloro-2-methylpropane reacts with water in three steps to yield 2-methyl-2-propanol. The first step is slower than the second, which in turn is much slower than the third. The reaction takes place slowly at room temperature, and the equilibrium constant is approximately 1.

  1. Give approximate values for螖骋卤 and 螖骋othat are consistent with the above information.
  2. Draw an energy diagram for the reaction, labeling all points of interest and making sure that the relative energy levels on the diagram are consistent with the information given.

Draw an energy diagram for a reaction with Keq=1 . What is the value of 螖骋o in this reaction?
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