virial coefficients

virial coefficients

[′vir·ē·əl ‚kō·i′fish·əns]
(thermodynamics)
For a given temperature T, one of the coefficients in the expansion of P/RT in inverse powers of the molar volume, where P is the pressure and R is the gas constant.
References in periodicals archive ?
Molecular origins of osmotic second virial coefficients of proteins.
Second virial coefficients and dn/dc values at various pHs and concentrations.
Key words: acoustic virial coefficients; calibration; density; helium; metrology; thermodynamic properties; virial coefficients.
the calculation of the second and third molar virial coefficients [B.
1]), and the virial coefficients are functions of temperature only, and equations for their calculation are given in Hyland and Wexler (1980).
Since catalytic surface temperatures are much larger than the characteristic Lennard-Jones temperature given by Equation (23), quantum corrections to second virial coefficients are neglected because these corrections are only significant below dimensionless temperatures T * = 0.
The closing chapters list enthalpy changes in polymer solutions at elevated pressures, PVT data of some selected polymers and their solutions, and second virial coefficients.
The CGS-3 can perform simultaneous analysis of both static and dynamic light-scattering parameters, resulting in better and faster measurement of particle size, molecular weight, diffusion coefficients and virial coefficients.
A short paper presented at the 1989 Prague meeting describes qualitatively the origin of the difference in the second virial coefficients of H2O and D2O steam, which is determined mainly by the change of the O-H or O-D stretching frequencies when the dimers are formed.
Key words: calibration; density; helium; metrology; path integral; thermodynamic properties; virial coefficients.
The Pitzer equation for the calculation of the second virial coefficients of pure compounds, written in its more updated form according to Tsonopoulos (Prausnitz et al.
The second virial coefficients in deionized water increased with increasing acrylamide content in the copolymers.