Manifestations of the effects of nonrigidity of molecules in the thermodynamic and transport characteristics of water vapor

V. I. Starikov, V. P. Kochanov

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    The influence of bending-rotation excitation of H2O on the thermodynamic and transport characteristics of water vapor was quantitatively analyzed. The second virial coefficient, the self-diffusion coefficients of excited H2O molecules, and the diffusion coefficients of these molecules in polar and nonpolar gases were considered. Substantial changes in the dipole moment of molecules caused by bending-rotation excitations were shown to seriously affect these characteristics in certain instances. An effective method for averaging the kinetic collision integrals over polar molecule orientations was suggested. The averaged integrals were determined in a wide range of variations of the parameter characterizing dipole-dipole interactions of molecules.

    Original languageEnglish
    Pages (from-to)530-534
    Number of pages5
    JournalRussian Journal of Physical Chemistry A
    Volume76
    Issue number4
    Publication statusPublished - 1 Apr 2002

    Fingerprint

    Steam
    water vapor
    flexibility
    Thermodynamics
    thermodynamics
    Molecules
    molecules
    diffusion coefficient
    nonpolar gases
    polar gases
    dipoles
    Dipole moment
    virial coefficients
    excitation
    dipole moments
    Gases
    Kinetics
    collisions
    kinetics
    interactions

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry

    Cite this

    Manifestations of the effects of nonrigidity of molecules in the thermodynamic and transport characteristics of water vapor. / Starikov, V. I.; Kochanov, V. P.

    In: Russian Journal of Physical Chemistry A, Vol. 76, No. 4, 01.04.2002, p. 530-534.

    Research output: Contribution to journalArticle

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    AB - The influence of bending-rotation excitation of H2O on the thermodynamic and transport characteristics of water vapor was quantitatively analyzed. The second virial coefficient, the self-diffusion coefficients of excited H2O molecules, and the diffusion coefficients of these molecules in polar and nonpolar gases were considered. Substantial changes in the dipole moment of molecules caused by bending-rotation excitations were shown to seriously affect these characteristics in certain instances. An effective method for averaging the kinetic collision integrals over polar molecule orientations was suggested. The averaged integrals were determined in a wide range of variations of the parameter characterizing dipole-dipole interactions of molecules.

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