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  • Volumetric and ultrasonic studies on interactions of ethylene glycol, Diethylene glycol (cas 111-46-6) and triethylene glycol in aqueous solutions of glycerol at temperatures T = (293.15 K − 308.15) K

  • Add time:08/26/2019    Source:sciencedirect.com

    Densities and ultrasonic speed of ethylene glycol, Diethylene glycol (cas 111-46-6) 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 Vϕo and the partial molar volumes of transfer ΔVϕo 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 Kϕ,so and partial molar isentropic compression of transfer ΔKϕ,so, 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 (∂Vϕ0/∂T)p, second order derivative (∂2Vϕ0/∂T2)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.

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