Licensed Under Creative Commons Attribution CC BY Ultrasonic Studies of Molecular Interactions in the Mixture of Pyridine with 1-Propanol at Different Temperatures

Abstract: Ultrasonic velocity (U), density (ρ) and viscosity (η) values of the mixture of pyridine with 1-propanol have been measured at 303K, 313K and 323K temperatures. From these data, acoustical parameters such as adiabatic compressibility (β), free length (Lf), free volume (Vf) and internal pressure (π i) have been estimated using the standard relations. The excess parameters such as βE, Lf E, Vf E and π i E are also determined from the experimental data. The results are interpreted in terms of molecular interaction between the components of the mixture. The ultrasonic velocity decreases with the mole fraction of 1-propanol in the binary mixture at all temperatures. The adiabatic compressibility (β) shows an inverse behaviour as compared to ultrasonic velocity at all temperatures