Recently an improved long-range model for electrolyte solutions was developed that is applicable from infinite dilution to pure salt. This paper tests this claim the first time applying it calculation of liquid-liquid equilibria mixtures different ionic liquids (ILs) and water. The conventional Pitzer-Debye-Hückel (PDH) equation compared two its new, thermodynamically consistent extensions. Bot...

A program has been developed for generating stability diagrams that concisely represent the thermodynamic state of multicomponent, multiphase aqueous systems in wide ranges of temperature and component concentrations. The diagrams are based on a thermodynamic model that combines the Helgeson-Kirkham-Flowers equation of state for standard-state properties with a solutions nonideality model based...

This paper examines the extent to which individuals seeking diffuse benefits from a regulator can overcome the free-rider problem. Specifically, I provide an explanation of why cable television rates are not consistently set at either the monopoly price or the competitive price -namely, communities differ in their ability to act collectively or form rent seeking coalitions. A model, motivated b...

Understanding of CO2 hydrate–liquid water two-phase equilibrium is very important for storage in deep sea and submarine sediments. This study proposed an accurate thermodynamic model to calculate solubility pure seawater at (HLWE). The van der Waals–Platteeuw coupling with angle-dependent ab initio intermolecular potentials was used the chemical potential hydrate phase. Two methods were describ...

Accurate quantum mechanical partition functions and absolute free energies of H(2)O(2) are determined using a realistic potential energy surface [J. Koput, S. Carter, and N. C. Handy, J. Phys. Chem. A 102, 6325 (1998)] for temperatures ranging from 300 to 2,400 K by using Monte Carlo path integral calculations with new, efficient polyatomic importance sampling methods. The path centroids are sa...

The fundamentals of scaling during waterflooding an oilfield are presented. Mineral precipitation is described using both the kinetics approach, with corresponding equations given, and thermodynamic models’ theoretical foundation discussed—mainly specific ion interaction Pitzer models. This paper focuses on process mixing incompatible waters water injection production from oilfield, as this was...

In 1937 Pitzer and Smith! measured the heat capacity of silver oxide (Ag 20 ) over the range 13-300 oK and found anomalously high values in the range 20-40 Hysteresis effects were noted with respect to the excess heat capacity. The entropy associated with the anomaly was approximately 0·5 cal °C-l molerl. Kobayashimeasured the heat capacity of silver oxide at higher temperatures and observed a ...

M.I.T. Quart. Prog. Rept., 50, 11 (1963); (f) McLean, A. D., J. Chem. Phys., 32, 1959 (1960). 6 Clementi, E., C. Roothaan, and M. Yoshimine, Phys. Rev., 127, 1618 (1962). 7K = 1.75, a(2s)= -0.559 au; a(2p)= -0.312 au; a(H) -0.50 au. 8 For BH a(2s) = -0.909 au; a(2p) = -0.314 au; a(H) = -0.591 au. For BB a(2s) -0.920 au; a(2pr) = -0.189 au; a(2pir) = -0.179 au. 9 Newton, M. D., unpublished work....