Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Recommended data for the limiting activity coefficients (c1 yen) of nitrobenzene, aniline, and cyclohexylamine in water were established as a function of temperature by the simultaneous correlation of the values resulting from specialized vapor-liquid equilibrium measurements and related thermal data for highly dilute solutions. The new values of c1 yen were determined by the Rayleigh distillation, circulation still, and headspace analysis methods. The limiting partial molar excess heat capacities were derived from measurements by the Picker flow microcalorimetry. These values were combined with all available literature data on the limiting activity coefficients and the limiting partial molar excess enthalpies. This allowed us to produce a thermodynamically consistent fit of c1 yen between 273 K and 373 K, which was in turn used in combination with pure solute vapor pressures to calculate the Henry s law constants (kH).