Osmotic Second Virial Coefficients of Aqueous Solutions from Two-Component Equations of State.

摘要: Osmotic second virial coefficients in dilute aqueous solutions of small nonpolar solutes are calculated from three different two-component equations state. The five noble gases, four diatomics, and six hydrocarbons the range C1–C4. state modified versions van der Waals, Redlich–Kwong, Peng–Robinson equations, with an added hydrogen-bonding term for solvent water. parameters resulting assigned so as to reproduce experimental values temperature dependence density, vapor pressure, compressibility solvent, gas-phase coefficient pure solute, solubility partial molecular volume earlier estimates solutes’ radii. For all 15 solutes, calculations done 298.15 K, whereas CH4, C2H6, C3H8 particular, they also functions over full 278.15–348.15 K. osmotic coe...