The ultrasonic velocity (u), density (ρ) and viscosity (η)

Molecular interaction studies using ultrasonic technique in the binary liquid mixtures of 4 -Methyl-2-pentanoneWith Butan-2-One,Furfuraldehyde and Cyclohexanone has been carried out at 308K temperature. Using the measured values of ultrasonic velocity, density and viscosity, acoustical parameters and their excess values are evaluated. From these excess parameters are used to discussing about the nature and strength of the interactions in these binary systems.

No abstract

The functions of ultrasonic velocity, density and viscosity for ternary liquid mixtures of 1-proponol, 1butanol and 1-pentanol with tetra hydro furan are determined by 303.15 K-313.15 K. This data is used to calculate various parameters like the excess free volume, excess internal pressure and Gibb's free energy, which is used to discuss molecular interactions in the ternary liquid mixtures.

The densities (ρ), speeds of sound (u), and viscosities (η) have been measured for ternary liquid mixtures of tetrahydrofuran in cyclohexanone with 1-hexanol and 1-octanol at 303.15-313.15 K over the entire range of mole fractions and at atmospheric pressure 0.1 MPa. These experimental data have been used to estimate the thermophysical properties of heterocyclic compounds with aliphatic alcohols at T = 303.15, 308.15 and 313.15 K. Preliminary data was used to assess the excess free volume, internal pressure and free energy of Gibbs, which were discussed in light of the molecular interaction surviving in the mixtures. Analysis of each of the two contributions, namely interaction, free volume VE showed that the contributions are positive for all systems. The variations of these parameters with the composition and the temperature were discussed with regard to the intermolecular interactions prevailing in these mixtures. These values also indicate the formation of a hydrogen bonding (C=O......OH) between the hydrogen atom of aliphatic alcohol of 1-hexanol/1-octanol and oxygen atom of heterocyclic compounds tetrahydrofuran in cyclohexanone in the ternary liquid mixtures.