Enthalpy of solution of KCl and NaCl in water at 298.15 K

The enthalpies of solution of KCl and NaCl in water at 298.15 K have been measured as a function of molality in a heat-flux calorimeter of the Tian-Calvet type built in our laboratory. The covered range is 0.01 to 0.06 mol·kg−1 for KCl and 0.01 to 0.11 mol·kg−1 for NaCl. An accurate electrical calibration has been done. Also, the quantitative influence of each of several experimental factors has been analysed. The experimental results have been compared with the available values from several authors. Finally, the enthalpies of solution at infinite dilution for KCl and NaCl at 298.15 K have been obtained.