Apparent molar volumes and apparent molar heat capacities of aqueous tetrahydrofuran, dimethyl sulfoxide, 1,4-dioxane, and 1,2-dimethoxyethane at temperatures from 278.15K to 393.15K and at the pressure 0.35MPa

• Published in: The Journal of chemical thermodynamics Vol. 40; no. 2; pp. 248 - 259
• Main Authors: Swenson, D.M., Blodgett, M.B., Ziemer, S.P., Woolley, E.M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2008
• Subjects: 1,2-Dimethoxyethane; 1,4-Dioxane; Apparent molar heat capacity; Apparent molar volume; Calorimetry; Densimetry; Dimethyl sulfoxide; Tetrahydrofuran; Apparent molar heat capacity; Dimethyl sulfoxide; 1,2-Dimethoxyethane; Tetrahydrofuran; Calorimetry; Apparent molar volume; Densimetry; 1,4-Dioxane
• ISSN: 0021-9614; 1096-3626
• DOI: 10.1016/j.jct.2007.06.010

We determined apparent molar volumes Vϕ at 278.15⩽(T/K)⩽368.15 and apparent molar heat capacities Cp,ϕ at 278.15⩽(T/K)⩽393.15 at p=0.35MPa for aqueous solutions of tetrahydrofuran at m from (0.016 to 2.5)mol·kg−1, dimethyl sulfoxide at m from (0.02 to 3.0)mol·kg−1, 1,4-dioxane at m from (0.015 to 2.0)mol·kg−1, and 1,2-dimethoxyethane at m from (0.01 to 2.0)mol·kg−1. Values of Vϕ were determined from densities measured with a vibrating-tube densimeter, and values of Cp,ϕ were determined with a twin fixed-cell, differential, temperature-scanning calorimeter. Empirical functions of m and T for each compound were fitted to our Vϕ and Cp,ϕ results.