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Volumetric, Ultrasonic and Transport Properties of Binary Liquid Mixtures Containing Dimethyl Formamide at 303.15 K
Author(s) -
Syamala Vardhana,
Raja Sekhar Damaramadugu,
Siva Kumar Kasibhatta,
Venkateswarlu Ponneri
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790013
Subject(s) - chemistry , formamide , intermolecular force , thermodynamics , isentropic process , speed of sound , compressibility , dichlorobenzene , mole fraction , analytical chemistry (journal) , organic chemistry , molecule , physics
Excess volumes ( V E ), ultrasonic velocities ( u ), isentropic compressibility ( ΔK s ) and viscosities ( η ) for the binary mixtures of dimethyl formamide (DMF) with 1,2‐dichlorobenzene, 1,3‐dichlorobenzene, 1,2,4‐trichlorobenzene, o ‐chlorotoluene, m ‐chlorotoluene, p ‐chlorotoluene, o ‐nitrotoluene and m ‐nitrotoluene at 303.15 K were studied. Excess volume data exhibit an inversion in sign for the mixtures of dimethyl formamide with 1,2‐ and 1,3‐dichlorobenzenes and the property is completely positive over the entire composition range for the mixtures of dimethyl formamide with 1,2,4‐trichlorobenzene, o ‐nitrotoluene and m ‐nitrotoluene. On the other hand, the quantity is negative for the mixtures of dimethyl formamide with chlorotoluenes. Isentropic compressibility ( K s ) has been computed for the same systems from precise sound velocity and density data. Further, deviation of isentropic compressibility ( ΔK s ) from ideal behavior was also calculated. ΔK s values are negative over the entire volume fraction range in all the binary mixtures. The experimental sound velocity data were analysed in terms of Free Length Theory (FLT) and Collision Factor Theory (CFT). The viscosity data were analysed on the basis of corresponding state approach. The measured data were discussed on the basis of intermolecular interactions between unlike molecules.