Chapter 16, Problem 16.68SP

Interpretation Introduction

Interpretation:

The role of signs of $\Delta H$ and $\Delta S$ in determining whether a reaction is spontaneous or non-spontaneous has to be described.

Concept Introduction:

Enthalpy change is $\Delta H$ and entropy change is $\Delta S.$

Gibbs free energy change is $\Delta G.$ $\Delta H,\Delta S$ and $\Delta G$ are related as,

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

A process can be of two types – spontaneous process and non-spontaneous process.  Spontaneous process occurs without any external influence from the surroundings and non-spontaneous occurs with the assistance of external influence from the surroundings.