Chapter 19, Problem 95AE

Interpretation Introduction

Interpretation:

The chemical reaction is given and the $\Delta H^0,\Delta G^0,K,\Delta S^0$ , the spontaneity and the change in free energy with increase in temperature is to be determined.

Concept Introduction:

The change in $\Delta H^0,\Delta S^0$ and $\Delta G^0$ is determined by taking difference of product of the number of moles with $\Delta H^0/\Delta S^0/\Delta G^0$ of products and reactants of the given reactants.

The values of change in $\Delta H^0,\Delta S^0$ and $\Delta G^0$ are related to each other as follows:

  $\Delta G^0=\Delta H^0-T\Delta S^0$

Also, the value of $\Delta G^0$ and equilibrium constant, K are related to each other as follows:

  $\Delta G^0=-RT\ln K$

The reaction is spontaneous if the value of $\Delta G^0$ is negative.

The free energy may become more positive or more negative on increasing the temperature depending upon the values of enthalpy and entropy changes.

(a)

To determine:

The values of $\Delta H^0,\Delta G^0,K$ and $\Delta S^0$ for the given reactions.

Step 1:

Interpretation Introduction

To determine:

The values of $\Delta H^0,\Delta G^0,K$ and $\Delta S^0$ for the given reaction.

Step 2:

Interpretation Introduction

To determine:

The values of $\Delta H^0,\Delta G^0,K$ and $\Delta S^0$ for the given reaction.

Step 3:

Interpretation Introduction

To determine: The values of $\Delta H^0,\Delta G^0,K$ and $\Delta S^0$ for the given reaction.

(b)

Interpretation Introduction

To determine:

The reactions which are spontaneous out of the given reactions.

(c)

Interpretation Introduction

To determine:

The change in free energies of the reactions given in part (a) with an increase in temperature.