The ultrasonic Studies in liquids are great use in understanding the nature and strength of molecular interactions. The thermo-acoustical parameters for three binary liquid mixtures namely, Acrolein + methanol, Acrolein + cyclohexane and Acrolein +1, 4–dioxane have been estimated, from the measured values of ultrasonic velocity (U), density (ρ) and viscosity (η). From the measured data, some of the thermo-acoustical parameters such as, adiabatic compressibility (βa), free length (Lf), free volume (Vf), internal pressure (πi), relaxation time (τ), acoustic impedance (Za) and Gibb’s free energy (ΔG) are computed at the temperature 303K. The present paper represents the nonlinear variation of ultrasonic and thermo- acoustical parameters lead to increased hydrogen bonding interaction between solute and solvent molecules. The behavior of these parameters with composition of the mixture has been discussed in terms of molecular interaction between the components of liquids.
