Chapter 3, Problem 3B.3ST

Interpretation Introduction

Interpretation:

The expression for the contribution to the change in molar entropy at low temperature has to be written.

Concept Information:

Change in entropy on heating at low range of temperature: When the heat capacity cannot be assumed to be constant over the low range of temperature, certain allowance has made for the variation of C with temperature.

The change in molar entropy is the area under the graph ${\text{C}}_{\text{p,m}}\left(\text{T}\right)\text{/T}$ plotted against T,

$\text{ΔS}\text{=}{\displaystyle \underset{T_i}{\overset{T_f}{\int }}\frac{\text{C}\left(T\right)}{T}}$