Chapter 3, Problem 3B.2AE

(i)

Interpretation Introduction

Interpretation: The entropy of vaporisation of trichloromethane at a given temperature has to be calculated.

Concept introduction: The randomness present in the system is called its entropy.  It is an extensive property.  At equilibrium, the entropy of the system is zero.  It is denoted by $S$.  The entropy of vaporisation is the increase in entropy when vaporisation of liquid takes place.  It is denoted by $\Delta {\text{S}}_{\text{vap}}$.

(ii)

Interpretation Introduction

Interpretation: The entropy change of the surroundings has to be calculated.

Concept introduction: The randomness present in the system is called its entropy.  It is an extensive property.  At equilibrium, the entropy of the system is zero.  It is denoted by $S$.  The total entropy is the summation of the entropy of the system and the surroundings.