Essential Organic Chemistry, Global Edition
Essential Organic Chemistry, Global Edition
3rd Edition
ISBN: 9781292089034
Author: Paula Yurkanis Bruice
Publisher: PEARSON
Question
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Chapter 5.9, Problem 18P

(a)

Interpretation Introduction

Interpretation:

The step has greatest free energy of activation in the forward direction has to be determined.

Concept introduction:

  • Reaction coordinate diagram is an abstract one dimensional coordinate which represents progress along a reaction pathway.
  • Reactant: These are the substances initially present in a chemical reaction
  • Product: These are the substances produced from reactants after a successful reaction.
  • Transition state: It is a hypothetical state that occurs in the space between the reactant and products in a chemical reaction.
  • Intermediate: It is a molecular entity formed from the reactants and reacts further to give the products.

    The mathematical relationship between enthalpy (H) and free energy (G) is,

    ΔG0=ΔH0-TΔS

  • In an exergonic reaction the products have a lower free energy than it consumes.
  • In an endergonic reaction the product have a higher free energy than it consumes.

(b)

Interpretation Introduction

Interpretation:

Whether the first formed intermediate more apt to revert to reactants or go on to form products has to be determined.

Concept introduction:

  • Reaction coordinate diagram is an abstract one dimensional coordinate which represents progress along a reaction pathway.
  • Reactant: These are the substances initially present in a chemical reaction. 
  • Product: These are the substances produced from reactants after a successful reaction.
  • Transition state: It is a hypothetical state that occurs in the space between the reactant and products in a chemical reaction.
  • Intermediate: It is a molecular entity formed from the reactants and reacts further to give the products.

    The mathematical relationship between enthalpy (H) and free energy (G) is,

    ΔG0=ΔH0-TΔS

  • In an exergonic reaction the products have a lower free energy than it consumes.
  • In an endergonic reaction the product have a higher free energy than it consumes.

(c)

Interpretation Introduction

Interpretation:

The rate determining step in the reaction has to be determined.

Concept introduction:

  • Reaction coordinate diagram is an abstract one dimensional coordinate which represents progress along a reaction pathway.
  • Reactant: These are the substances initially present in a chemical reaction. 
  • Product: These are the substances produced from reactants after a successful reaction.
  • Transition state: It is a hypothetical state that occurs in the space between the reactant and products in a chemical reaction.
  • Intermediate: It is a molecular entity formed from the reactants and reacts further to give the products.

    The mathematical relationship between enthalpy (H) and free energy (G) is,

    ΔG0=ΔH0-TΔS

  • In an exergonic reaction the products have a lower free energy than it consumes.
  • In an endergonic reaction the product have a higher free energy than it consumes.

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Fill in the blanks: Progress of the reaction This is the reaction diagram of reactant A converted to product D (A → D). The reaction has 2 intermediates. It has 3 transition states. The fastest step in the reaction is the conversion of c to d because it has the lowest activat Is the first step of the reaction (exergonic or endergonic?) because is The overall reaction is (exergonic or endergonic?) because Free energy
For a reaction that generates both kinetic and thermodynamic products, which of the following is associated with the thermodynamic product? O It involves the lower energy transition state. O tis formed faster. O Itis favored with cold reaction conditions. O It is the more stable product.
What is the effect on the rate constant and reaction rate when reaction temperature is increased?    The rate constant will be greater, and the reaction rate will be higher.                  The rate constant will be smaller, but the reaction rate will be higher.            The rate constant will be smaller, and the reaction rate will be lower.

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