Chapter 5, Problem 5D.13E

(a)

Interpretation Introduction

Interpretation:

The enthalpy of solution for $L{i}_{2}S{O}_4$ is positive or negative has to be identified.

Concept introduction:

When the heat energy was absorbed by the system from the surrounding is called endothermic reaction

When heat energy or light energy was unconfined to the surrounding from the system is called exothermic reaction.

(b)

Interpretation Introduction

Interpretation:

For the $L{i}_{2}S{O}_4$, the chemical equation has to be written.

(c)

Interpretation Introduction

Interpretation:

The larger value for $L{i}_{2}S{O}_4$ is the lattice enthalpy or the enthalpy of hydration has to be identified.