Chapter 5, Problem 5.38NP

Interpretation Introduction

Interpretation:

The value of $\Delta S_m$ of a-quartz needs to be determined.

Concept Introduction :

The change in entropy can be calculated as below:

  $\Delta S_m={\displaystyle \underset{T_i}{\overset{T_f}{\int }}\frac{{\text{C}}_{\text{P,m}}}{\text{T}}\text{dT}}-{\displaystyle \underset{P_i}{\overset{P_f}{\int }}{V}_m\beta dP}$

Here

  $\Delta S$ = Change in entropy

C_p,m= molar heat capacity at constant pressure

V_m= molar volume

ß = isobaric volumetric thermal expansion coefficient

P = pressure