Investigation of molecular interactions in binary mixtures (dichloromethane + aliphatic alcohols) at T = (298.15 to 308.15) K: Experimental, ERAS analyses and COSMO-RS predictions

Abstract Densities ρ , and ultrasonic velocities, u of binary mixtures of pure dichloromethane (DCM) with methanol (Me-OH), ethanol (Et-OH), propan-1-ol (Pr-OH) and butan-1-ol (Bu-OH) including those of their binary liquids were measured at (298.15, 303.15 and 308.15) K. From the experimental data the excess molar volume, V m E , deviation in isentropic compressibility, Δk s , deviation in specific acoustic impedance, ΔZ , deviation in intermolecular free length, ΔL f , and deviation in ultrasonic velocity, Δu were calculated. The experimental excess molar volume values were correlated with theoretical values derived from extended real association solution model (ERAS). The σ -profile of dichloromethane and aliphatic alcohols were computed with conductor-like screening model (COSMO-RS) and are interpreted to show the possible interactions between the mixing components.