TY - JOUR
T1 - Thermodynamics of strong aqueous electrolyte solutions at t = 25 °c described by the Hückel equations
AU - Rowland, Darren
AU - May, P.M.
PY - 2014
Y1 - 2014
N2 - A theoretical framework based on the Hückel equation for activity coefficients has been developed, and the physicochemical properties of 57 binary strong electrolyte solutions at t = 25 °C have been correlated. These properties include the activity and osmotic coefficients, apparent molar relative enthalpies, apparent molar heat capacities, and apparent molar volumes. The correlating equations agree well with property values from the literature up to concentrations of m = 2.0 mol kg-1 for 1:1 electrolytes and m = 0.5 mol kg-1 for 2:1, 1:2, and 3:1 electrolytes. Certain electrolytes could not be satisfactorily represented, including polyprotic acids, 2:2 electrolytes, and the zinc and cadmium halides. In addition to quantifying Hückel equation parameters that can be used for the convenient calculation of physicochemical property values, the results provide a benchmark against which other theoretical frameworks with few adjustable parameters can be compared. © 2014 American Chemical Society.
AB - A theoretical framework based on the Hückel equation for activity coefficients has been developed, and the physicochemical properties of 57 binary strong electrolyte solutions at t = 25 °C have been correlated. These properties include the activity and osmotic coefficients, apparent molar relative enthalpies, apparent molar heat capacities, and apparent molar volumes. The correlating equations agree well with property values from the literature up to concentrations of m = 2.0 mol kg-1 for 1:1 electrolytes and m = 0.5 mol kg-1 for 2:1, 1:2, and 3:1 electrolytes. Certain electrolytes could not be satisfactorily represented, including polyprotic acids, 2:2 electrolytes, and the zinc and cadmium halides. In addition to quantifying Hückel equation parameters that can be used for the convenient calculation of physicochemical property values, the results provide a benchmark against which other theoretical frameworks with few adjustable parameters can be compared. © 2014 American Chemical Society.
U2 - 10.1021/je500180m
DO - 10.1021/je500180m
M3 - Article
SN - 0021-9568
VL - 59
SP - 2030
EP - 2039
JO - Journal of Chemical and Engineering Data
JF - Journal of Chemical and Engineering Data
IS - 6
ER -