Volumetric and ultrasonic studies on interactions of ethylene glycol, diethylene glycol and triethylene glycol in aqueous solutions of glycerol at temperatures T = (293.15 K − 308.15) K. (October 2018)

• Record Type: Journal Article
• Authors: Kaur, Kirandeep; Behal, Isha; Juglan, Kailash Chandra; Kumar, Harsh
• Is Part Of: Journal of chemical thermodynamics. Volume 125(2018)
• Page Start: 93
• Page End: 106
• Publication Date: 2018-10
• Subjects: Glycol -- Glycerol -- Apparent molar volume -- Apparent molar isentropic compression -- Ion-ion interaction; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2018.05.016
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: New densities and speeds of sound of glycols in aqueous glycerol solutions. Change in partial molar volume due to weakening of H-bond. Thermal expansion, release of molecules from solvation layer. Glycerol and water molecules induce dehydration of glycol. Pair and triplet interaction coefficients predict pair wise interactions. Abstract: Densities and ultrasonic speed of ethylene glycol, diethylene glycol and triethylene glycol in (0.00, 0.01, 0.03, 0.05) mol kg −1 aqueous solutions of glycerol have been measured at T = (293.15, 298.15, 303.15, 308.15) K and experimental pressure p = 0.1 MPa. From the density data, the apparent molar volume Vϕ, the partial molar volume V ϕ o and the partial molar volumes of transfer Δ V ϕ o have been calculated for glycols from water to aqueous glycerol solutions. Using ultrasonic speed values apparent molar isentropic compression Kϕ, s, partial molar isentropic compression K ϕ, s o and partial molar isentropic compression of transfer Δ K ϕ, s o, have been evaluated. The pair and triplet coefficients have been computed from partial molar volumes of transfer and partial molar isentropic compression of transfer. The apparent molar isobaric expansion at infinite dilution ( ∂ V ϕ 0 / ∂ T ) p, second order derivative ( ∂ 2 V ϕ 0 / ∂ T 2 ) p have also been calculated. The parameters thus obtained have been discussed in terms of (solute–solute)/(solute–solvent) interactions prevailing in the present ternary system along with structure making/structure breaking tendency of glycols in aqueous glycerol solutions.