Abstract
Density and viscosity of binary liquid mixtures of household kerosene (HHK) and premium motor spirit (PMS) were determined over the entire range of mole fraction at 303K. Excess molar volume (VE), molar volume (Vm), Excess Viscosity (ηE), Viscosity deviations (Δη) and excess Gibbs free energies of activation of viscous flow (ΔGE) were calculated. The results obtained shows that excess free energy of activation were all positive over the entire mole fraction. The viscosity deviation shows both negative and positive values. The positive VE obtained in this study shows increase in volume in the binary mixture. This work will help in effective monitoring, detection of adulterated kerosene and subsequent enforcement of severe penalty on such adulteration.
Highlights
The mixing of different solvents results in the formation of a solution that is different from individual solvents
The studies of Excess properties such as deviation in viscosity, Excess molar volume and Excess Gibbs free energy of activation of viscous flow of binary mixtures are useful in understanding the nature of intermolecular interactions between two liquids [3,4]
To investigate the molecular interaction between Household kerosene (HHK) and premium motor spirit (PMS),excess molar volumes (VE), deviation in viscosity (Δη), excess viscosity, and excess Gibbs free energy of activation of viscous flow (ΔGE) were calculated from experimental density and viscosity using the method described in our earlier work as stated in equations 1 – 4 respectively [7]
Summary
The mixing of different solvents results in the formation of a solution that is different from individual solvents. The studies of Excess properties such as deviation in viscosity, Excess molar volume and Excess Gibbs free energy of activation of viscous flow of binary mixtures are useful in understanding the nature of intermolecular interactions between two liquids [3,4]. Agencies of government saddled with the responsibility of monitoring and detection of such fraud as well as enforcement of standards of such products have been failing in their responsibility, the need to devise simple techniques for such determinations. In this present study, density (ρ) and viscosity (η) of binary mixture of household kerosene (HHK) and premium motor spirit (PMS) are reported at 303K. This study is expected to give information on the volume changes in this binary solution that explains intermolecular interactions in the mixture
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