Abstract:
Using thermodynamic principles, the general relationship describing the equilibrium
vapor content in the gas phase above a saline liquid and across a curved liquid-gas
interface is developed. Since high salt concentration also affects the intensive and
extensive liquid properties, it is also necessary to account for these effects in liquid
water content/liquid water pressure relationship curves so that experimentally derived
curves for pure water may be useful for elevated salt concentrations. The appropriate
thermodynamic relationship is derived to describe the salt effects on liquid and vapor
properties. The resulting equations are valid for salt concentrations between zero and
saturation, and for any temperatures that nominally occur in near-surface geologic
materials. An example using the derived relationships for NaC1 is included.
