Excess volume, viscosity and compressibility of binary mixtures consisting of o -chlorophenol, o -cresol and m -cresol with n-n- diethyl acetamide at different temperatures

The densities, viscosities and ultrasonic velocities of binary mixtures of o-chlorophenol, o-cresol, m-cresol with N,N-diethyl acetamide have been determined at 308.15, 313.15, 318.15, 323.15 K over the whole composition-range, using density bottle, ostwald viscometer, and with single crystal ultrasonic pulse echo-interferometer respectively. These data have been utilized to estimate the excess volume (V E ), excess viscosity (η E ), excess compressibility (K S E), excess intermolecular free-length, and Grunberg and Nissan parameter d. Values of V E for o-chlorophenol + N,N-diethyl acetamide system and m-cresol + N,N-diethyl acetamide system are negative at all temperatures but, for o-cresol + N-N diethyl acetamide V E values are positive at lower mole fraction of o-cresol and increase with increase in temperature. η E values are positive for all the systems and the magnitude of η E decreases with increase of temperature in all cases. K s E values are negative for all the systems over the whole composition-range. Analysis of these suggests the absence of any strong specific interactions.