Results 161 to 170 of about 22,801 (218)

Correlation of Third Virial Coefficients to Second Virial Coefficients

Berichte der Bunsengesellschaft für physikalische Chemie, 1989
AbstractA correlation is given for the prediction of third virial coefficients of pure substances and mixtures in terms of second virial coefficients. The substance properties which are needed for the correlation are the critical temperature, the reduced dipole moment, and the parameters for the hard body modelling the molecule.
Nguyen Van Nhu, Gustavo A. Iglesias, Friedrich Kohler   +2 more
openaire   +1 more source

Second Virial Coefficient of Polar Gases

The Physics of Fluids, 1962
The theoretical expressions for the second virial coefficient, B(T), are derived for the (18–6-3) Stockmayer potential Φ(r)=4ε[(σr)18−(σr)6]−μ2r3g(θ1,θ2,φ),where g(θ1, θ2, φ) = 2 cos θ1 cos θ2 − sin θ1 sin θ2 cos φ, and also according to the (28–7-3) potential.
Saxena, S. C., Joshi, K. M.
openaire   +1 more source

Second virial coefficient of vapors

Journal of Engineering Physics, 1985
An expression is offered for calculation of the second virial coefficient of vapors of nonassociative materials and their mixtures.
L. P. Filippov, N. L. Veretel'nikova, A. D. Okhotsimskii   +2 more
openaire   +1 more source

Second virial coefficient of methanol

Journal of Chemical & Engineering Data, 1970
L O W P R E S S U R E compressibility measurements result ing in values of t he second virial coefficient over t he temperature range 25" to 400" C. have been reported by various investigators ( 2 , 3, 5, 8 , 9 , 10, 12, 20, 2 6 ) . Data at pressures considerably above atmospheric have been reported by Ramsay and Young ( I S ) , Lashakov ( 1 3 ) , Pe t
Arvind P. Kudchadker, P. T. Eubank
openaire   +1 more source

The surface second virial coefficient

Molecular Physics, 1980
The theory of surface virial series is applied to adsorption on a homogeneous solid. Explicit results are given for the Lennard-Jones 12-6 and 9-3 potentials and for the square-well potential with different energies for the solid-gas and gas-gas interaction.
J. Stecki, S. Sokołowski
openaire   +1 more source

Quantum second virial coefficient paradox

Physics Letters A, 1986
Abstract The quantum second virial coefficient vanishes when we apply directly Moller operators. We analyze such a paradox, giving an answer: Usual scattering formulas fail in some cases.
J.G. Muga, J. Veguillas
openaire   +1 more source

Second virial coefficient for directed manifolds

Physical Review A, 1991
The second virial coefficient for a D-dimensional polymerized manifold with only mutual repulsive interaction for the same internal D coordinate has been calculated using the perturbative renormalization-group method. This can be carried out to all orders of the perturbative expansion for this model.
openaire   +2 more sources

Second virial coefficients of dipolar hard spheres

Journal of Physics: Condensed Matter, 2010
An asymptotic formula is reported for the second virial coefficient B(2) of a dipolar hard-sphere (DHS) fluid, in zero external field, for strongly coupled dipolar interactions. This simple formula, together with the one for the weak-coupling B(2), provides an accurate prediction of the second virial coefficient for a wide range of dipole moments ...
Philipse, A.P., Kuipers, B.W.M.
openaire   +3 more sources

Second virial coefficient at low temperatures

Physica A: Statistical Mechanics and its Applications, 1977
Abstract The S-matrix-pole-representation of the second virial coefficient for short range potentials is discussed. The method is especially useful at low temperatures.
D. Kremp, R. Gau, M. Schlanges, W.D. Kraeft   +3 more
openaire   +1 more source

The Second Virial Coefficient near Absolute Zero

Proceedings of the Physical Society. Section A, 1952
By the solution of Bloch's equation for the density matrix, a development is obtained suitable for the exact evaluation of the second virial coefficient near absolute zero Assuming a molecular interaction of the Lennard-Jones type, it is shown that the virial coefficient for helium is -{½(πβ)3/2+31 15πβ+O(1)}A3, πβ=38 04/T General formulae are given ...
openaire   +2 more sources