In this study, values of the density and viscosity of aniline and normal alkanol (1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol) were measured at 293.15−323.15 K. The governing molecular forces in the mixtures were discussed by two important parameters, namely, the mutual diffusion coefficient D12 and separation ratio ψ. Values of the separation ratio are negative for all binary fluids and increase with the CH2 groups of alcohols. Findings indicate that increasing the alcohol chain length increases its movement and reduces its interaction with aniline molecules. The perturbed chain statistical associating fluid model was utilized to correlate the mixture densities at different temperatures. The consistency amon
