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Thermodynamics of Pseudo-hard Body Mixtures

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    0323569 - ÚCHP 2009 RIV GB eng J - Journal Article
    Rouha, M. - Nezbeda, Ivo
    Thermodynamics of Pseudo-hard Body Mixtures.
    [Termodynamika směsí pseudo-tuhých těles.]
    Molecular Physics. Roč. 106, 21-23 (2009), s. 2481-2485. ISSN 0026-8976. E-ISSN 1362-3028
    R&D Projects: GA AV ČR IAA400720710; GA AV ČR IAA400720802
    Institutional research plan: CEZ:AV0Z40720504
    Keywords : pseudo-hard bodies * mixtures * virial coefficients
    Subject RIV: CF - Physical ; Theoretical Chemistry
    Impact factor: 1.634, year: 2009

    Thermodynamic properties of binary mixtures of hard spheres of various size and pseudo-hard bodies, mimicking the short-range non-additive repulsive interactions in realistic models of water, have been determined over the entire concentration range using standard NVT Monte Carlo simulations. Virial coefficients of the mixture have also been computed. Having no other theoretical tool currently available, a perturbed virial expansion is examined with respect to its potential to estimate/predict the properties of the mixture without resorting to any fitting of simulation data. The perturbed virial expansion is found to perform quite accurately for the mixtures containing larger spheres, whereas for small spheres dissolved in water the result is only qualitatively correct.

    Monte Carlo simulacemi byly určeny termodynamické vlastnosti směsi pseudo-tuhých tělles a tuhých koulí. Byly vypočteny viriální koeficienty a poruchový viriální rozvoj byl použit k teoretickému popisu výsledků. Bylo nalezeno, že pro velké tuhé koule použitý popis je přesný, přesnost se ale zmenšuje s klesající velikostí rozpuštěné tuhé koule.
    Permanent Link: http://hdl.handle.net/11104/0171485

     
     
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