DENSITIES OF LIQUIDS AND VAPORS IN BOILING NACL-H2O SOLUTIONS - A PVTX SUMMARY FROM 300-DEGREES-C TO 500-DEGREES-C

Experimental data for densities of liquids and vapors on the two-phase surface of the system NaCL-H2O were complied and evaluated to provide a complete summary between 300-degrees and 500-degrees-C, a range for which the system changes from subcritical to critical behavior. Data for the NaCl-H2O critical line and for the three-phase assemblage halite + liquid + vapor were first evaluated over a much wider T-P range, and the best fits of these curves were used as extrema to guide curve positioning for P-V isothermal plots of experimental points in between. Data were replotted as T-V isobars, corrected for consistency, and replotted again as V-x isotherms and finally as P-T isochores in an iterative process until an internally consistent set of densities was obtained. The results are added to a previously published PTx summary compiled in the same manner to provide a PTx summary of the present state of knowledge. Results are in table form of use to the understanding of two-phase behavior in boiling hydrothermal systems and to theoretical modeling of this important system.