期刊
FLUID PHASE EQUILIBRIA
卷 500, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fluid.2019.112252
关键词
Thermodynamics; Equations of state; Perturbation theory; Water; Hydrogen bond
In this work we develop a new classical perturbation theory for water which incorporates the transition to tetrahedral symmetry in both the dispersion and hydrogen bonding contributions to the free energy. This transition is calculated self-consistently using Wertheim's thermodynamic perturbation theory. However, since the reference fluid structure to the hydrogen bonding theory itself depends on hydrogen bonding, the theory represents an approach which goes beyond perturbation theory. The theory is shown to accurately represent the thermodynamics of pure water. It is demonstrated that the new theory can reproduce the anomalous density maximum as well as minima in the isothermal compressibility and isobaric heat capacity. (C) 2019 Elsevier B.V. All rights reserved.
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