Excess heat capacities of 1-methyl pyrrolidin-2-one and pyridine or picolines mixtures

The excess heat capacities, image of binary 1-methyl pyrrolidin-2-one (i) + pyridine or α- or β- or γ-picoline (j) mixtures have been measured as a function of composition at 293.15, 298.15 and 303.15 K using micro differential scanning calorimeter (Model – μDSC 7 Evo). The image data have been fitted to Redlich–Kister equation to calculate binary adjustable parameters and standard deviations. The measured property of the studied mixtures has been analyzed in terms of Graph (which deals with the topology of the constituent of mixtures) theory. It has been observed that Graph theory describes well the image data of the investigated binary mixtures.