THERMODYNAMIC PROPERTIES OF AQUEOUS-ELECTROLYTE SOLUTIONS .2. VAPOR-PRESSURE OF AQUEOUS-SOLUTIONS OF NABR, NAI, KCI, KBR, KI, RBCL, CSCL, CSBR, CSI, MGCL2, CACL2, CABR2, CAI2, SRCL2, SRBR2, SRI2, BACL2, AND BABR2

A differential static method was used for the measurement of vapor pressures of aqueous solutions of NaBr, NaI, KCl, KBr, KI, RbCl, CsCl, CsBr, CsI, MgCl2, CaCl2, CaBr2, CaI2, SrCl2, SrBr2, SrI2, BaCl2, and BaBr2 from 0.5 to 8.6 m and in the temperature range of 303.15-343.15 K. The experimental data for the binary solutions were fitted to the Antoine type of equation, log [P (kPa)] = A (m) + B(m)/[T (K)] + C(m)/[T (K)]2, where A, B, and C are constants and are concentration dependent. Vapor pressure data were used to calculate activity and osmotic coefficients in the temperature range studied for understanding the nonideal behavior of these solutions.