Studies on associated solutions: Evaluation of thermodynamic parameters of blends of N-methyl formamide and o- substituted aniline at various temperatures

For binary mixtures of N-methylformamide and ortho-substituted anilines (2-chloroaniline, 2-
methylaniline, and 2-methoxyaniline) spanning the complete composition range from 303.15 K
to 318.15 K and at atmospheric pressure 0.1 MPa, the densities (ρ) and velocity of sound (u) are
provided. The densities and sound velocity at experimental temperatures are used to determine
the excess functions (VE and κsE). The Redlich–Kister equation correlates excess functions. For
all the binary systems at infinity dilutions, the excess partial molar isentropic compressibilities
are determined. The Prigogine-Flory-Patterson theory is used to interpret the VE data