C. Rambabu

Theoretical Evaluation of Ultrasonic Velocities in Binary Liquid Mixtures of Anisaldehyde with Some Alcoxyethanols at Different Temperatures

Ultrasonic velocities and densities of the binary liquid mixtures of anisaldehyde with alcoxyethanols like methoxyethanol (MOE), ethoxyethanol (EOE), and butoxyethanol (BOE) have been measured at temperatures 303.15u2009K, 308.15u2009K, 313.15u2009K, and 318.15u2009K over the entire composition range of mole fractions. The theoretical values of ultrasonic velocity were evaluated using Nomotos relation (), impedance relation (), ideal mixing relation (), Jungies relation (), and Rao’s specific velocity relation (). The molecular interaction parameter () has been evaluated from the values of experimental and theoretical velocities. The variation of this interaction parameter with the composition mixture has been discussed in terms of molecular interactions.

Thermo physical properties and IR spectra of 2-chloroethanol and 2-phenylethanol in N-methyl-2-pyrrolidone at different temperatures and 101.3 kPa

ABSTRACT The interactions of 2-chloroethanol (2-CE) and 2-phenylethanol (2-PE) in N-methyl-2-pyrrolidone (NMP) as a function of temperature have been investigated. The density (ρ), and ultrasonic velocity (u), of 2-CE and 2-PE in NMP have been measured in the temperature interval T = (303.15, 308.15, 313.15 and 318.15) K and atmospheric pressure. The excess molar volume, excess partial molar volume, excess partial molar volume at infinite dilution and excess isentropic compressibility of 2-CE and 2-PE in NMP binary liquid solutions were determined at measured temperatures. The calculated excess functions , and were fitted to Redlich–Kister equation to estimate binary interaction parameters. The excess functions have been discussed in terms of molecular interactions between component molecules of the binary mixtures and their interacting abilities were compared. Infrared spectroscopy (FT-IR) measurements have also been done to explain the molecular interaction in the binary liquid mixtures.

Theoretical Evaluation of Ultrasonic Velocities in Binary Liquid Mixtures of Anisic Aldehyde with some Esters at Different Temperatures Using Different Theories and Models

Densities and Ultrasonic velocities of the binary liquid mixtures of Anisicaldehyde with Methyl Acetate (MA) Ethyl Acetate (EA) and Butyl Acetate (BA) have been measured at a temperature range from 303.15 to 318.15 K with an interval of 5 K, over the entire composition of mole fractions. The theoretical values of ultrasonic velocity were evaluated using the Nomoto’s relation (UNR), Impedance relation (UIR), Ideal mixing relation (UIMR), Rao’s specific velocity relation (UR) Junjie’s relation (UJR) and Danusso model (UD). The molecular interaction parameter (χ), Chi-square value, average percentage error (APE) have been evaluated to find the best applicable theory. The variation of this interaction parameter with the mole fraction of common compound has been discussed in terms of molecular interactions.