Chapter 13, Problem 91IAE

Interpretation Introduction

(a)

Interpretation:

The stability of Ag₂O at ${25}^{\circ }\text{C}$ needs to be determined.

Concept introduction:

The Gibb’s equation of thermodynamic proposed a relation between $\text{ΔS}$, $\text{ΔH}$ and $\text{ΔG}$ with Temperature. The mathematical expression of Gibb’s equation can be written as:

$\text{ΔrG}°\text{ = ΔrH}°\text{ - TΔrS}°$

$\text{ΔrG}°$, $\text{ ΔrH}°$ and $\text{ΔrS}°$ can be calculated with help of given equation:

$\begin{array}{l}\text{ΔrH° = ΔrH°(product) - ΔrH°(reactant) }\\ \text{ΔrS° = ΔrS°(product) - ΔrS°(reactant) }\\ \text{ΔrG° = ΔrG°(product) - ΔrG°(reactant) }\end{array}$

With the help of this equation one can predict the change in $\text{ΔS}$, $\text{ΔH}$ and $\text{ΔG}$.

Interpretation Introduction

(b)

Interpretation:

The stability of Ag₂O at $200{}^{\circ }\text{C}$ needs to be determined.

Concept introduction:

The Gibb’s equation of thermodynamic proposed a relation between $\text{ΔS}$, $\text{ΔH}$ and $\text{ΔG}$ with temperature. The mathematical expression of Gibb’s equation can be written as

$\text{ΔrG}°\text{ = ΔrH}°\text{ - TΔrS}°$

$\text{ΔrG}°$, $\text{ ΔrH}°$ and $\text{ΔrS}°$ can be calculated with help of given equation:

$\begin{array}{l}\text{ΔrH° = ΔrH°(product) - ΔrH°(reactant) }\\ \text{ΔrS° = ΔrS°(product) - ΔrS°(reactant) }\\ \text{ΔrG° = ΔrG°(product) - ΔrG°(reactant) }\end{array}$

With the help of this equation one can predict the change in $\text{ΔS}$, $\text{ΔH}$ and $\text{ΔG}$.