Chapter 18, Problem 18.125SP

Interpretation Introduction

(a)

Interpretation:

The value of $\Delta G°$ is to be determined for $\text{AgBr}$.

Concept introduction:

The formula that determine $\Delta G°$ of the reaction is,

$\Delta G°=\Delta H°-T\Delta S°$

The expression to evaluate equilibrium constant is as follows:

$K=e^{-\left(\frac{\Delta G°}{RT}\right)}$

Where,

• $K$ represents equilibrium constant.
• $\Delta G°$ denotes standard free energy change.
• $R$ denotes gas constant.
• $T$ denotes temperature.

Interpretation Introduction

(b)

Interpretation:

The value of $K_{\text{sp}}$ is to be determined for $\text{AgBr}$.

Concept introduction:

The expression to evaluate equilibrium constant is as follows:

$K=e^{-\left(\frac{\Delta G°}{RT}\right)}$

Where,

• $K$ represents equilibrium constant.
• $\Delta G°$ denotes standard free energy change.
• $R$ denotes gas constant.
• $T$ denotes temperature.

Interpretation Introduction

(c)

Interpretation:

The value of $\Delta G$ is to be determined for $\text{AgBr}$ and whether this value is in consistent with relative values of $Q$ and $K_{\text{sp}}$ is to be determined.

Concept introduction:

The expression to evaluate free energy for non-standard condition is as follows:

$\Delta G=\Delta G°+RT\ln Q$

Where,

• $Q$ is reaction quotient.
• $\Delta G°$ denotes standard free energy change.
• $R$ denotes gas constant.
• $T$ denotes temperature.