The densities (ρ), viscosities (Ã?â?°Ã?³) and Ultrasonic velocity (U) of binary liquid mixture of Acrolein with the solvent methanol were measured over the entire composition range at the temperature 298K for the frequency 10MHz. The observed experimental data have been utilized to evaluate some of the derived thermodynamic parameters such as adiabatic compressibility (βa ) , free length (Lf), free volume (Vf), internal pressure (πi), relaxation time (τ) and acoustic impedance (Za). The behavior of these parameters with composition of the mixture has been discussed in terms of molecular interaction between the components of liquids. The excess values of adiabatic compressibility (βa E), free volume (Vf E) and free length (Lf E) were evaluated and discussed in the light of molecular interactions in the mixture.
