Chapter 18, Problem 67AP

Interpretation Introduction

Interpretation:

The entropy change of sublimation for the given reactionis to be calculated.

Concept introduction:

All the energy available with the system thatis utilized in doing useful work is called Gibbs free energy.

Sublimation is a phase transition in which solid directly changes to gas.

The enthalpy of the system is defined as the sum of the internal energy and the product of the pressure and the volume. Enthalpy is the state function. It is an extensive property.

The change in the entropy of sublimation is calculated by using the expression as follows:

$\Delta G=\Delta H_{\text{sub}}-T_{\text{sub}}\Delta S_{\text{sub}}$.