Chapter 14, Problem 7E

(a)

Summary Introduction

To calculate: The equilibrium constant for the given reaction.

Concept introduction: The standard Gibbs free energy change is the change in Gibbs free energy when 1 mole of a pure substance is formed from its reactant under standard condition.  The change in the free energy of a chemical reaction is determined by the concentration of the reactants and its products.

(b)

Summary Introduction

To determine: Whether the given reaction serves as a control point for the citric acid cycle.

Concept introduction:

The standard Gibbs free energy change is the change in Gibbs free energy when 1 mole of a pure substance is formed from its reactant under standard condition.  The change in the free energy of a chemical reaction is determined by the concentration of the reactants and its products. The citric acid cycle is a series of chemical reactions in which acetyl-CoA oxidizes into two molecules of CO₂ and conserves the liberated free energy in the reduced compounds of NADH and FADH₂.