Acoustic, volumetric and spectroscopic investigations in binary mixtures of formamide/N-methylformamide+2-chloroethanol at various temperatures

The ultrasonic velocity (u) and density (rho) of binary liquid mixtures of formamide (FA) and N-methylformamide (NMF) with 2-chloroethanol (2-CletOH) have been measured at temperatures 298.15, 308.15 and 318.15 K, over the entire composition range. From the experimental values of ultrasonic velocity and density, the various acoustical parameters have been evaluated. The excess values of ultrasonic velocity (u(E)), adiabatic compressibility (beta(E)(S)) and molar volume (V-m(E)) were also calculated. Further, the infrared spectra of both of the systems, FA + 2-CletOH and NMF + 2-CletOH, have been recorded at room temperature (298.15 K). (C) 2013 Elsevier B.V. All rights reserved.