Thermodynamic Properties of Aqueous Potassium Fluoride under Superambient Conditions

Using the ion-interaction or virial coefficient approach developed by Pitzer, the pressure dependences of the osmotic and activity coefficients for KF (aq.) up to 473.15 K and 2.5.0 mol-kg^-1 have been calculated from literature data for the apparent molar volumes of KF (aq.). These pressure dependencies were combined with the osmotic and activity coefficient at 0.1 MPa or p_sat, obtained from the model of Saluja et al. to yield a comprehensive set of thermodynamic properties for KF (aq.) at temperatures from 298.15 through 473.15 K, pressures 10, 20, and 30 MPa, and molalities to 2.5 mol-kg^-1.