Effect of temperature on the volumetric properties of dilute aqueous solutions of 1,2-hexanediol, 1,5-hexanediol, 1,6-hexanediol, and 2,5-hexanediol

Excess molar volumes VmE and partial molar volumes V¯2 have been determined from density measurements for dilute aqueous solutions of 1,2-hexanediol, 1,5-hexanediol, 1,6-hexanediol, and 2,5-hexanediol at (283.15, 288.15, 293.15, 298.15, 303.15, and 308.15) K as a function of composition. The infinite dilution partial molar volumes V¯2∞ of alcohols in aqueous solution are evaluated through extrapolation. Interactions of the different solutes with water are discussed in terms of the effect of the position of the hydroxyl groups in the hexanediol molecule. The limiting slope of the partial molar volumes is interpreted in terms of alkanediol hydration.