Excess molar volumes and excess isentropic compressibilities of mixtures containing lactam, cyclic ethers and cyclic alkanones

Measurements of densities, ρ, ρ123 and speeds of sound, u, u123 of binary 1,3-dioxolane (1) + 1,4-dioxane (2) and ternary 1,3-dioxolane (1) + N-methylpyrrolidi-2-one or 1,4-dioxane (2) + cyclohexanone or cycloheptanone (3) mixtures have been carried out over the entire range of mole fraction at 293.15, 298.15, 303.15, 308.15 K and atmospheric pressure. The excess molar volumes, V12E, V123E and excess isentropic compressiblities, (κSE)12, (κSE)123 have been determined from experimental data. The V123E and (κSE)123 data for 1,3-dioxolane (1) + N-methylpyrrolidin-2-one (2) + cyclohexanone or cycloheptanone (3) and 1,3-dioxolane (1) + 1,4-dioxane (2) + cycloheptanone (3) mixture are negative over entire composition of (1) and (2). While V123E for 1,3-dioxolane (1) + 1,4-dioxane (2) + cyclohexanone (3) are positive across full range of compositions of (1) and (2); the sign and magnitude of (κSE)123 values vary with change in composition of the constituent molecules. The V12E, V123E and (κSE)12, (κSE)123 data have been fitted to Redlich-Kister equation to determine binary, ternary adjustable parameters and standard deviations. The V123E and (κSE)123 data have been analyzed in terms of Graph Theory. It has been observed that Graph theory correctly predicts the sign as well as magnitude of V123E and (κSE)123 data of the studied ternary mixtures.