THERMODYNAMIC PROPERTIES OF AQUEOUS MAGNESIUM-CHLORIDE SOLUTIONS FROM250 TO 600 K AND TO 100 MPA

A new general model that describes the thermodynamic properties of MgC l2(aq) has been developed from a global fit to experimental results, i ncluding isopiestic molalities, vapor pressure measurements, freezing- point depressions, enthalpies of dilution, heat capacities, and densit ies, for this system. The model is based on a recent ion-interaction t reatment with extended higher-order virial terms, and on experimental results from 240 to 627 K at pressures to 100 MPa and molalities to 25 mol . kg(-1). (C) 1998 American Institute of Physics and American Che mical Society. [S0047-2689(98)00305-5].