Adiabatic Compressibility, Free Length and Acoustic Impedance of Sodium Benzoate in Ethanol Water Mixtures

The study of thermodynamic molecular interactions of sodium benzoates in aqueous organic medium gives useful information in industrial chemistry. The study of ultrasonic parameters is directly related to a number of thermodynamic parameters. The ultrasonic velocity, density and viscosity are measured for various solutions of sodium benzoate in ethanol water media. Using the above data the acoustic parameters like adiabatic compressibility, free length and specific acoustic impedance are evaluated. The variation of these parameters gives interesting and useful information regarding the molecular interaction existing in the solution.