Thermophysical Studies on Binary Liquid Mixtures of Benzyl Alcohol and Alkylamines at 298.15–308.15 K

Abstract

In the present study, the new experimental values of thermophysical properties namely density (ρ) and viscosity (η) for binary liquid mixtures of benzyl alcohol (BA) with n-butylamine (n-BA), sec-butylamine (s-BA) and tert-butylamine (t-BA) have been measured over the whole range of mole fraction of benzyl alcohol at atmospheric pressure and at 298.15, 303.15, and 308.15 K temperatures. Using the thermophysical data, excess molar volume ($V_{m}^{E}$), viscosity deviation (∆η), and also apparent molar volumes (${{V}_{{m,\varnothing ,1}}}~$ and ${{V}_{{m,\varnothing ,2}}}$) were calculated. Further, the Redlich–Kister (R–K) equation was used to correlate $V_{m}^{E}$ and ∆η properties at all worked temperatures. Based on obtained results intermolecular interactions (H-bond and ${{\pi }}{-} {\text{HN}}$) were determined. The $V_{m}^{E}$ values were found to be negative deviations and ∆η values were found to be positive deviations over the full range of mole fraction of benzyl alcohol for all systems. Furthermore, the effect of temperature on ρ, η, $V_{m}^{E}$, and ∆η was also informed.