Enthalpies of Interaction of N,N-Dimethylformamide with Polyalcohols in Aqueous Solutions at 298.15 K

Enthalpies of mixing of aqueous DMF solutions with aqueous polyalcohols (glycol, 1,2-propanediol, 1,3-propanediol, and glycerol) solutions and their respective enthalpies of dilution have been determined at 298.15 K using flow microcalorimetry. The experimental results obtained have been analyzed to give the heterotactic enthalpic interaction (or virial) coefficients of the solutes in terms of the McMillan−Mayer model. The enthalpic pairwise interaction coefficients hxy have been discussed from the points of view of solute−solute interactions. In addition, using the additivity groups approach by Savage and Wood (SWAG), contributions of each of the functional group of DMF and the polyalcohol studied have been estimated.

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