THERMODYNAMIC PROPERTIES OF THE NABR + H2O SYSTEM

Equations that described the thermodynamic properties of the NaBr + H2O system were obtained from a fit to experimental results for this system. The experimental results included in the fit spanned the range of temperature of approximately 260 to 623 K and the range of pressure from the vapor pressure of the solution to 150 MPa. New equations and/or values for the following properties are given in the present work: 1) the change in chemical potential with respect to temperature and pressure for NaBr(cr), valid from 200 to 900 K, 2) DELTA(f)G(m)degrees and DELTA(f)H(m)degrees for formation from the elements for NaBr(cr) for 298.15 K and 0.1 MPa, 3) DELTA(f)G(m)degrees and DELTA(f)H(m)degrees from the elements, as well as S(m)degrees and C(p,m)degrees, all for 298.15 K, 0.1 MPa for NaBr.2H2O(cr), 4) the change in chemical potential for both NaBr and H2O in NaBr(aq) as a function of temperature, pressure, and molality, valid from 260 to 600 K and from the vapor pressure of the solution to 150 MPa.