Chapter 9, Problem 9.24A

Interpretation Introduction

(a)

Interpretation:

A balanced chemical equation for the reaction needs to be determined.

Concept introduction:

A chemical reaction is said to be balanced, if there are equal number of atoms of same elements on both sides of the reaction arrow.

Interpretation Introduction

(b)

Interpretation:

The sign of $\Delta H$ and $\Delta S$ for the above reaction needs to be determined.

Concept introduction:

The entropy is defined as randomness in the system. For a system with more gaseous species, the randomness is more as compared to liquid and solid species.

For an exothermic reaction, the sign of $\Delta H$ is negative and for endothermic reaction it is positive.

Interpretation Introduction

(c)

Interpretation:

Whether the reaction is spontaneous at low temperature, high temperature or at all temperatures needs to be explained.

Concept introduction:

The relation between change in enthalpy, change in Gibbs free energy and change in entropy is represented as follows:

$\Delta G=\Delta H-T\Delta S$

Here, $\Delta G$ is change in Gibbs free energy, $\Delta H$ is change in enthalpy, T is temperature and $\Delta S$ is change in entropy.