Chapter 5, Problem 5.37NP

Interpretation Introduction

Interpretation:

The entropy of 1 mole of water vapor at 175 C and 0.625 bar needs to be calculated.

Concept Introduction:

The entropy of a given substance at temperature T₂ and pressure P₂ is related to the standard temperature T₁ and pressure P₁ as:

  ${\text{S(T}}_{\text{2}}{\text{, P}}_{\text{2}}{\text{) =S}}^0{\text{(T}}_1{\text{, P}}_1\text{) }-\text{nRln}\frac{{\text{P}}_{\text{2}}}{{\text{P}}_{\text{1}}}{\text{ + nC}}_{\text{p}}\text{ln}\frac{{\text{T}}_{\text{2}}}{{\text{T}}_{\text{1}}}\text{ -----(1)}$