Abstract: The specific and non specific inter molecular interactions are sensitive to composition, temperature and presence of different functional groups in the mixture under investigation. Group contribution methods are powerful tools for the prediction of thermodynamic and transport properties of liquid mixtures, for studying the excess molar volume and deviation function in the viscosity. In order to investigate the presence of specific and non specific interactions between the constituent molecules of binary mixtures of Cyclohexane with some Protic and aprotic solvents for measurement of densities and viscosities as the function of mole fractions are carried out. From the measured values excess molar volume and deviation in viscosity is calculated.

Keywords: Excess volume, Deviation in viscosity, Molecular interactions.