Acoustic and Volumetric Properties of Mixture of (N,N-Dimethylacetamide + Ethyl Acrylate) with 1-Butanol oriso-Butanol ort-Butanol at 308.15 K

摘要

Densities,ρ, and ultrasonic speeds,uof mixtures of 1-butanol oriso-butanol ort-butanol with equimolar mixture of (N,N-dimethylacetamide + Ethyl acrylate) over the entire composition range have been measured atT=308.15 K. Using the experimental results, deviation in ultrasonic speed,Δu, deviation in isentropic compressibility,Δks, excess molar volume,VmE, excess intermolecular free length,LfE, and excess acoustic impedance,ZE, have been calculated. The variation of these properties with composition of the mixtures has been discussed in terms of molecular interactions in these mixtures. The deviation/excess properties have been fitted to Redlich-Kister type polynomial and the corresponding standard deviations have been calculated. Negative values ofVmE,Δks, andLfEand positive values ofΔu, andZEare observed over the entire composition range. The observed negative and positive values of deviation/excess properties are attributed to the strong interactions between the unlike molecules of the mixtures. Further theoretical values of sound velocity in the mixtures have been evaluated using various theories and compared with experimental sound velocities to verify the applicability of such theories to the systems studied. Theoretical ultrasonic velocity data has been used to study molecular interactions in the systems investigated.