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Studies of the Thermodynamic Properties of Hydrogen Gas in Bulk Water

Journal Article · · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry
DOI:https://doi.org/10.1021/jp075459v· OSTI ID:1426949
 [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

In this study, the thermodynamic properties of hydrogen gas in liquid water are investigated using Monte Carlo molecular simulation and the quasichemical theory of liquids. The free energy of hydrogen hydration obtained by Monte Carlo simulations agrees well with the experimental result, indicating that the classical force fields used in this work provide an adequate description of intermolecular interactions in the aqueous hydrogen system. Two estimates of the hydration free energy for hydrogen made within the framework of the quasichemical theory also agree reasonably well with experiment provided local anharmonic motions and distant interactions with explicit solvent are treated. Both quasichemical estimates indicate that the hydration free energy results from a balance between chemical association and molecular packing. Additionally, the results suggest that the molecular packing term is almost equally driven by unfavorable enthalpic and entropic components.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1426949
Report Number(s):
SAND--2007-1644J; 524421
Journal Information:
Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry, Journal Name: Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry Journal Issue: 3 Vol. 112; ISSN 1520-6106
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Assessment of Simple Models for Molecular Simulation of Ethylene Carbonate and Propylene Carbonate as Solvents for Electrolyte Solutions book January 2018
Case study of Rb+(aq), quasi-chemical theory of ion hydration, and the no split occupancies rule journal January 2013
Ab initio molecular dynamics calculations of ion hydration free energies journal May 2009
CO 2 solvation free energy using quasi-chemical theory journal June 2011
Quasi-chemical theory of F (aq): The “no split occupancies rule” revisited journal October 2017
Electrostatic solvation free energies of charged hard spheres using molecular dynamics with density functional theory interactions journal October 2017
MCCCS Towhee: a tool for Monte Carlo molecular simulation journal December 2013
Utility of chemical computations in predicting solution free energies of metal ions journal June 2017
Ab initio molecular dynamics calculations of ion hydration free energies text January 2009

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