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Partial molal volume and partial molal compressibility of polyethylene glycol in water

Using the experimental data of Gerecze [Acustica, 38 (1977) 51] on ultrasonic velocity, density and refractive index of aqueous polyethylene glycol, the values of partial molal volume (Φ v 0), experimental slope (Sv) and partial molal compressibility (Φ K 0) at different temperatures, interaction coefficient (Q), molal volume of Vand's equation at 20°C (V) and molar refraction (R m ) have been calculated. Validity of Vand's equation and molar refraction equation for polyethylene glycol is displayed. Temperature dependence hydration nature of polyethylene glycol has also been discussed.