Studies of Mixing Properties of Binary Mixtures of 1-Propanolwithtoluene, Isomeric Chlorotoluenes and Toluidineat T = (298.15, 303.15, 308.15, and 313.15) K

The density (ρ), speed of sound (u) of binary mixtures of 1-propanol with toluene, isomeric chlorotoluenes and toluidine at T = (298.15,303.15, 308.15 and 313.15) K were measured. The experimental data have been used to calculate excess volume (V^E) and excess isentropic compressibility (K^E_s) over the wide range of composition. These excess thermodynamic data were tabulated and presented graphically. The excess properties have been fitted by Redlich-Kister and Hwang polynomial equations and the results were used to obtain fitting parameters and ischolar_main mean square deviations. Further the theoretical models namely crystal field theory (CFT) and free length theory (FLT) were used to analyze the experimental speed of sound data. More over the experimental results have been used to understand the nature of interactions between unlike molecules in terms of hydrogen bonding, dipole-dipole interaction, and dispersive forces.