Chapter 8, Problem 8.65E

(a)

Interpretation Introduction

Interpretation:

An explanation corresponding to the fact that the given value of entropy of formation of ${\text{Mg}}^{2+}\left(\text{aq}\right)$ doesn’t violate the third law of thermodynamics is to be stated.

Concept introduction:

Entropy is a thermodynamic property which shows the randomness or disorder of the atoms within the system. $\Delta S$ is known as the entropy change for a system.

(b)

Interpretation Introduction

Interpretation:

The reason regarding the negative entropy of formation of any ion from a molecular level is to be explained.

Concept introduction:

Entropy is a thermodynamic property which shows the randomness or disorder of the atoms within the system. $\Delta S$ is known as the entropy change for a system.