Chapter 6: Energetic Effects in Hydrogen-bonded Liquids and Solutions
Published:08 Sep 2017
C. A. Cerdeiriña, K. Zemánková, and M. Costas, in Enthalpy and Internal Energy: Liquids, Solutions and Vapours, ed. E. Wilhelm and T. Letcher, The Royal Society of Chemistry, 2017, ch. 6, pp. 159-178.
Download citation file:
The heat capacity of a variety of liquids and solutions containing molecules that are able to form hydrogen bonds reflects energetic phenomena at a molecular level in a specific manner: its temperature dependence has the shape of a so-called Schottky peak which, in the light of simple statistical mechanical two-state models, indicates that the population of two particle energy levels prevails. We outline here that this simple scenario relating macroscopic and microscopic behavior is common to: hydrogen bonding in alcohols and other associated liquids and solutions; the anomalies of supercooled water; the thermodynamics of hydrophobic hydration; and the aggregation of the hydrophobic moieties of amphiphilic molecules in aqueous solution.