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Title: Vapor-liquid phase equilibria of water modelled by a Kim-Gordon potential

Journal Article · · Chemical Physics Letters

Gibbs ensemble Monte Carlo simulations were carried out to investigate the properties of a frozen-electron-density (or Kim-Gordon, KG) model of water along the vapor-liquid coexistence curve. Because of its theoretical basis, such a KG model provides for seamless coupling to Kohn-Sham density functional theory for use in mixed quantum mechanics/molecular mechanics (QM/MM) implementations. The Gibbs ensemble simulations indicate rather limited transferability of such a simple KG model to other state points. Specifically, a KG model that was parameterized by Barker and Sprik to the properties of liquid water at 300 K, yields saturated vapor pressures and a critical temperature that are significantly under- and over-estimated, respectively.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
971786
Report Number(s):
LLNL-JRNL-411318; CHPLBC; TRN: US1001256
Journal Information:
Chemical Physics Letters, Vol. 479, Issue 1-3; ISSN 0009-2614
Country of Publication:
United States
Language:
English

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