LAUSR

In Part 1 of this two-part study (J. Chem. Eng. Data 2017, 62, 2617–2632), we presented fully traceable two-parameter Huckel equations (with parameters B and b1) for the activity and osmotic coefficients in dilute aqueous NaCl solutions in the temperature range (0 to 80) °C, and these equations apply within experimental error to almost all thermodynamic data existing in the literature and used in the tests at least up to a molality of 0.2 mol·kg–1. These data include also molar enthalpies of the components in the solutions. In our model, parameter B is treated as a constant whereas parameter b1 depends in a quadratic way on the temperature. No calorimetric data were used in the parameter estimation of the model. In this second part (Part 2) of the study, the results of the quantities associated with the heat capacity of NaCl solutions are considered. All heat capacity data available for NaCl solutions at least up to 0.2 mol·kg–1 can be predicted within experimental error using the same Huckel equations as...