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  • 1
    Electronic Resource
    Electronic Resource
    On the calculation of second virial coefficients for nonspherical molecules (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 503-513 
    Details
    ISSN: 1572-9567
    Keywords: equation of state ; molecular gases ; nonspherical interactions ; second virial coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A self-consistent scheme is given for the calculation of the contributions of nonspherical molecular interactions to second virial coefficients. The usual longrange nonspherical interactions, which are asymptotically valid only at large separations, are modified by damping functions that render them valid at small separations as well. Numerical tables of new auxiliary functions J n D (T*) are given for 6⩽n⩽30 and 0.5⩽T *⩽10. These are designed to be used in the identical statistical-mechanical formalism for the second virial coefficient that had been developed for the undamped long-range nonspherical interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500842
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Equation of state for compressed liquids and their mixtures from the cohesive energy density (1993)
    Springer
    International journal of thermophysics 14 (1993), S. 685-697 
    Details
    ISSN: 1572-9567
    Keywords: cohesive energy ; compressed liquids and mixtures ; equation of state ; statistical mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A procedure is presented, based on statistical-mechanical theory, for predicting the equation of state of compressed normal liquids and their mixtures from two scaling constants that are available from measurements at ordinary pressures and temperatures. The theoretical equation of state is that of Ihm, Song, and Mason, and the two constants are the enthalpy of vaporization and the liquid density at the triple point, which are related to the cohesive energy density of regular solution theory. The procedure is tested on a number of substances ranging in complexity from Ar and CO2 to n-heptane and toluene. The results indicate that the liquid density at any pressure and temperature can be predicted within about 5%, over the range from T tp to T c and up to the freezing line. Possible methods of determining the scaling constants are discussed, as well as other possible choices for scaling constants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00502102
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Compressibility of liquids: Theoretical basis for a century of empiricism (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 855-868 
    Details
    ISSN: 1572-9567
    Keywords: argon ; equation of state ; Lennard-Jones fluid ; liquid compressibility ; Tait equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We show how the successful empirical results of the past century for the compressibility of liquids can be obtained from a recent statistical-mechanical theory that includes dense fluids as well as low-density gases and vapors. The theory also shows to what extent the results for liquids can be extended to dense supercritical fluids and how they can be generalized to any number of dimensions. For simplicity only argon and a Lennard-Jones (12,6) fluid are examined in detail, but the results can probably be extended to real molecular fluids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00502411
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Equation of state for mixtures of nonpolar fluids: Prediction from experimental constants of the components (1992)
    Springer
    International journal of thermophysics 13 (1992), S. 1053-1060 
    Details
    ISSN: 1572-9567
    Keywords: equation of state ; gases ; mixtures ; nonpolar fluids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a simple procedure by which an analytical equations of state for a mixture of normal fluids can be predicted from the constantsT c (critical temperature),p c (critial pressure), and ω (Pitzer acentric factor) for each pure component. The equation covers the range from the dilute vapor or gas to the highly compressed liquid or supercritical fluid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01141215
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Improved tables for the calculation of nonspherical contributions to second virial coefficients (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 1115-1133 
    Details
    ISSN: 1572-9567
    Keywords: equation of state ; molecular gases ; nonspherical interactions ; second virial coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A set of improved numerical tables is given for use in calculating the effects of nonspherical molecular interactions on the second virial coefficients of simple molecular gases. The second virial coefficients are given as a spherical-core contribution (not discussed in this paper) plus a series of nonspherical perturbation terms. The tables give easy-to-interpolate auxiliary functions that occur in the perturbation terms. These functions depend on the form assumed for the spherical-core part of the interaction potential, but only in a relatively insensitive way, so that the tables should be adequate for almost all calculations that are likely to occur in this connection. The auxiliary functions J nT are tabulated for n from 6 to 30 and T from 0.5 to 10, where T* = kT/ɛe 0 and ɛe 0 is the well depth of the spherical-core potential. Explicit formulas are given for the simple cases of axially symmetric molecules, but the tabulated functions can also be used for more complex cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503970
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    Paper (German National Licenses)
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