Vapor pressures of aqueous KCl and MgCl2 solutions from 273.16 to 643.15 K

The Wagner–Pruss equation is modified for expressing the vapor pressures of aqueous KCl and MgCl2 solutions from 273.16 to 643.15 K. The salt concentrations are up to 20.7 mass% for the H2O + KCl system and 20.9 mass% for the H2O + MgCl2 system. This study adds the concentration-dependent terms to the Wagner–Pruss equation and multiplies the reduced temperature by Tc/647.096, where Tc is the critical temperature of the aqueous solution in Kelvin.