Volumetric and viscometric properties of aqueous solutions of N-(2-hydroxyethyl)morpholine at T = (293.15, 303.15, 313.15, 323.15, 333.15) K

Add time:09/03/2019    Source:sciencedirect.com

Densities, ρ, and viscosities, η, of aqueous solutions of N-(2-hydroxyethyl)morpholine were measured over the entire composition range at T = (293.15, 303.15, 313.15, 323.15, 333.15) K and at atmospheric pressure. The excess molar volumes VE and viscosity deviations ηE of aqueous solutions were calculated from the experimental results of density and viscosity measurements and fitted to the Redlich–Kister polynomial equation. Apparent molar volumes Vϕ, partial molar volume at infinite dilution V∞, and the thermal expansion coefficient α were also calculated. The VE values were found to be negative over the entire composition range at all temperatures studied and become less negative with increasing temperature, whereas the viscosity data ηE exhibited positive deviations from ideal behaviour.

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