VOLUMETRIC PROPERTIES OF MIXTURES OF 1,4-DIOXANE AND WATER AT HIGH-PRESSURES

Densities of aqueous of 1,4-dioxane have been measured at temperatures from 298 to 348 K and at pressures up to 40 MPa by a vibrating-tube m ethod. Molar volumes obtained with an estimated uncertainty of +/-0.2% are correlated with pressure by the Tait equation within the experime ntal uncertainty. Pressure and composition dependences of the excess m olar volume, partial molar volume, and isothermal compressibility are determined and they are compared with those of other aqueous solutions .