مشخصات پژوهش

عنوان	Apparent molar volume, isentropic compressibility and conductivity of di-sodium hydrogen phosphate in water and in aqueous solutions of 1-propanol
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Keywords: Apparent molar volume; Isentropic compressibility; Conductivity; Refractive index; Di-sodium hydrogen phosphate; 1-Propanol
چکیده	Abstract Precise measurements on the density and sound velocity of solutions of di-sodium hydrogen phosphate in 1-propanol +water mixed-solvent media with alcohol mass fractions of 0.00, 0.05, 0.10 and 0.15 are reported in the 283.15–303.15K temperature range at 5K intervals. Electrical conductivity and refractive index of the solutions are studied at 298.15 K. From the experimental density and sound velocity data, the apparent molar volume and isentropic compressibility values of di-sodium hydrogen phosphate have been evaluated. The results show a positive transfer volume of di-sodium hydrogen phosphate from an aqueous 1-propanol solution to a more concentrated 1-propanol solution. The apparent molar isentropic compression of di-sodium hydrogen phosphate in aqueous 1-propanol solutions is negative and it increases with increasing the concentration of 1-propanol and temperature. The negative values of apparent molar isentropic compression imply that the water molecules around the di-sodium hydrogen phosphate are less compressible than the water molecules in the bulk solutions. The effects of the electrolyte concentration and relative permittivity of the medium on the molar conductivity were also investigated.
پژوهشگران	هانا پرهیزگار (نفر سوم)، روشن خوشنوازی (نفر دوم)، رحمت صادقی (نفر اول)