Chapter 5, Problem 5.5P

(a)

Interpretation Introduction

Interpretation:

Glucose has to be classified as endergonic or exergonic.

Concept Introduction:

Exergonic reactions:

A reaction is thermodynamically feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{<}\text{0}$ (in the sense K > 1).  These type of reactions are called as exergonic reactions.

Endergonic reactions:

A reaction is thermodynamically not feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{>}\text{0}$ (in the sense K < 1).  These type of reactions are called as endergonic reactions.

(b)

Interpretation Introduction

Interpretation:

Methylamine has to be classified as endergonic or exergonic.

Concept Introduction:

Exergonic reactions:

A reaction is thermodynamically feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{<}\text{0}$ (in the sense K > 1).  These type of reactions are called as exergonic reactions.

Endergonic reactions:

A reaction is thermodynamically not feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{>}\text{0}$ (in the sense K < 1).  These type of reactions are called as endergonic reactions.

(c)

Interpretation Introduction

Interpretation:

Octane has to be classified as endergonic or exergonic.

Concept Introduction:

Exergonic reactions:

A reaction is thermodynamically feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{<}\text{0}$ (in the sense K > 1).  These type of reactions are called as exergonic reactions.

Endergonic reactions:

A reaction is thermodynamically not feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{>}\text{0}$ (in the sense K < 1).  These type of reactions are called as endergonic reactions.

(d)

Interpretation Introduction

Interpretation:

Ethanol has to be classified as endergonic or exergonic.

Concept Introduction:

Exergonic reactions:

A reaction is thermodynamically feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{<}\text{0}$ (in the sense K > 1).  These type of reactions are called as exergonic reactions.

Endergonic reactions:

A reaction is thermodynamically not feasible if the value of ${\text{Δ}}_{\text{r}}{\text{G}}^{\sout{\text{0}}}\text{>}\text{0}$ (in the sense K < 1).  These type of reactions are called as endergonic reactions.