Thermodynamic Properties of the NaBr+H2O System

Abstract

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) ΔfG0m and ΔfH0m for formation from the elements for NaBr(cr) for 298.15 K and 0.1 MPa, 3) ΔfG0m and ΔfH0m from the elements, as well as S0m and C0p,m, 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. © 1991, American Institute of Physics for the National Institute of Standards and Technology. All rights reserved.