activity coefficient


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activity coefficient

[‚ak′tiv·əd·ē ‚kō·ə′fish·ənt]
(physical chemistry)
A characteristic of a quantity expressing the deviation of a solution from ideal thermodynamic behavior; often used in connection with electrolytes.
References in periodicals archive ?
If nonideal solution behavior originates only from spatial and/or physical considerations among the solvents, nonideal solution activity coefficient models will adequately account for excess swelling observed in elastomers.
The authors demonstrated that the activity coefficient of carbon dioxide is considerably higher in the methanol-carbon dioxide mixture, and that the non-linearity of the liquid phase is due to the auto association present in methanol (as they suggested).
The relation between the mass-based infinite dilution activity coefficient of the solvent, ([[OMEGA].
Modification of PSRK mixing rules and results for vapor-liquid equilibria, enthalpy of mixing and activity coefficients at infinite dilution.
in the liquid phase are very low compared to the other species present in the equilibrated liquid phase, they have been neglected in the material balances and activity coefficient calculations.
Influence of base (nickel and iron) and impurity elements in ferronickel on activity coefficient and, as a result, on sulfur activity may be estimated by parameters of interaction of first order (the Wagner parameter), which represent ratio of partial derivative of logarithm of activity coefficient of an element (in this case sulfur) to weight share (%) of the impurity
16], because of the change of ion environment, the change of activity coefficient and liquid junction potential error could modify the ion data as Na[HCO.
Ki is the equilibrium constant for the gas reaction and fi is the activity coefficient.
16 Comparison and analysis of investment activity coefficient and rate of return on investment in Industry
The weight fraction activity coefficient (1) of the solute at infinite dilution can be calculated from following relation [28].