EXCESS MOLAR ENTHALPIES OF BINARY-MIXTURES CONTAINING DIMETHYL CARBONATE OR DIETHYL CARBONATE AND ONE OF 6 METHYL N-ALKYL KETONES - APPLICATION OF AN EXTENDED CELL MODEL

Excess molar enthalpies H-m(E) of binary mixtures containing dimethyl carbonate or diethyl carbonate and six methyl n-alkyl ketones have bee n determined at 298.15 K and atmospheric pressure using a flow microca lorimeter. The systematic behaviour of H-m(E), increasing with the inc rease in the number of the carbon atoms in the ketone, is confirmed fo r all mixtures with the exception of mixtures of diethyl carbonate and 2-propanone. The experimental data have been correlated by means of t he Redlich-Kister equation and results are interpreted in terms of mol ecular interactions, and are examined by an extended cell model.