Density, viscosities and speed of sound of binary mixtures of acetophenone with methanol, hexane, Dimethylformamide (DMF) and Tetrahydrofuran (THF) were measured at 308.15 K. Excess molar volume, excess viscosity, excess isentropic compressibility and viscous flow of activation of mixtures were estimated from the experimental results.

Knowledge of mixing properties of binary mixtures has applications in multiple industrial process area such as fluid flow, heat and mass transfer. Information about these properties is required for various engineering designs and their subsequent operations. Further, these data are important for their use in the extraction and separation processes. Some of these thermodynamic excess properties of liquid mixtures have been very useful in understanding molecular interactions and geometrical effects in the system (Chawla et al., 1983; Brocos et al., 1996; Takigawa and Tamura 2000; Oswal and Desai 2001; Ali et al., 2005; Pandey et al., 2007; and Pandiyan, 2011).

The study of molecular interactions in binary organic mixtures has been actively investigated by our group (Baluja and Oza, 2001; Baluja et al., 2001 and 2007; and Kulshrestha and Baluja, 2010). As acetophenone is widely used in industries, it is selected for the present study and its binary mixtures with methanol, Dimethylformamide (DMF), hexane and Tetrahydrofuran (THF) were studied for the evaluation of excess properties such as excess molar volume, excess viscosity, excess isentropic compressibility and viscous flow of activation. For these properties, density, viscosity and speed of sound of these binary mixtures were measured at 308.15 K.

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