EP ESSENTIAL ORG.CHEM.-MOD.MASTERING
EP ESSENTIAL ORG.CHEM.-MOD.MASTERING
3rd Edition
ISBN: 9780133858501
Author: Bruice
Publisher: PEARSON CO
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Chapter 5.7, Problem 16P

(a)

Interpretation Introduction

Interpretation:

A reaction coordinate diagram for the reaction in which the product is thermodynamically stable and kinetically unstable should be drawn.

Concept introduction:

  • Thermodynamic stability can be represented as ΔG0.  Depend upon the value of ΔG0 it is possible to find stability of the product compared with the reactant.
  • If ΔG0 is negative, then the product is thermodynamically stable compared with the reactant.
  • If ΔG0 is positive, then the product is thermodynamically unstable compared with the reactant
  • 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.
  • Kinetic stability can be represented as ΔG.  Depend upon the value of ΔG it is possible to find stability of the product compared with the reactant.
  • If ΔG is large, then the reactant is kinetically stable because it reacts slowly.
  • If ΔG is small, then the reactant is kinetically unstable because it reacts rapidly.
  • If ΔG for the reverse reaction is large then he product is kinetically stable, similarly if it is small then the product is kinetically unstable.
  • Reaction coordinate diagram shows how the energy of the system changes during a chemical reaction.

(b)

Interpretation Introduction

Interpretation:

A reaction coordinate diagram for the reaction in which the product is thermodynamically unstable and kinetically stable should be drawn.

Concept introduction:

  • Thermodynamic stability can be represented as ΔG0.  Depend upon the value of ΔG0 it is possible to find stability of the product compared with the reactant.
  • If ΔG0 is negative, then the product is thermodynamically stable compared with the reactant.
  • If ΔG0 is positive, then the product is thermodynamically unstable compared with the reactant.
  • 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.
  • Kinetic stability can be represented as ΔG.  Depend upon the value of ΔG it is possible to find stability of the product compared with the reactant.
  • If ΔG is large, then the reactant is kinetically stable because it reacts slowly.
  • If ΔG is small, then the reactant is kinetically unstable because it reacts rapidly.
  • If ΔG for the reverse reaction is large then he product is kinetically stable, similarly if it is small then the product is kinetically unstable.
  • Reaction coordinate diagram shows how the energy of the system changes during a chemical reaction.

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