Entropy of evaporation
The standard entropy of evaporation of liquids follows the Pictet-Trouton rule (after Raoul Pictet and Frederick Thomas Trouton ). Accordingly, the value of the standard entropy of evaporation for many non-polar liquids is in the vicinity of ≈ 88–90 J K −1 mol −1 . The reason here is the comparably large increase in “disorder” in the transition from liquid to gas. Strong deviations are mostly due to anomalously strongly interconnected molecules , so liquid water is stabilized by hydrogen bonds and structured more strongly (higher short-range order ), which results in a high standard entropy of evaporation .
- Compare Erich Meister: Basic Practical Course in Physical Chemistry: Theory and Experiments , 2nd Edition. Edition 2012, p. 35.