Analysis of excess molar heat capacities of three component mixtures comprising of cyclic organic solvents: Graph and Flory theories

The present work reports measurement and estimation of heat capacities, CP and excess heat capacities, (CEP)ijk (using CP data) of 1-methylpiperidine (i) + pyrrolidin-2-one (j) + cycloheptanone or cyclohexanone or cyclopentanone (k) mixtures at several temperatures. (C-P(E))(ijk) data have been correlated with the mole fraction of the constitutional molecule (via Redlich-Kister polynomial) to commute standard deviations and ternary coefficients. (C-P(E))(ijk )data have also been examined in terms of Graph and Flory's theories. It has been perceived that (C-P(E))(ijk )values computed using Graph theory compare well with their corresponding experimental values. Further, (C-P(E))(ijk) data obtained by Flory's theory for 1-methylpiperidine (i) + pyrrolidin-2-one (j) + cyclopentanone (k) mixtures are of the same sign.