Equation of State of an Infinitely Dilute Solution of Argon in Water

A new equation of state is proposed for a solution of gas at infinite dilution, based on considering the interaction between a gas and a solvent at the microscopic level. It is used to describe the properties of an infinitely dilute aqueous solution of argon in a wide range of temperatures and pressures, including the supercritical region of water. It is shown that the resulting equation is capable of predicting the properties of an aqueous solution of an inert gas with high accuracy, based on a limited set of data at moderate temperatures.