Thermophysical properties of binary mixtures of 1-aminobutane with butanol at 298.15 K to 318.15 K: FTB model, PFP theory and Ab-initio approach

This study investigated the molecular interactions within mixtures of 1-aminobutane and alkanol such as n-butanol, sec-butanol, and iso-butanol. Excess molar volume (), excess speed of sound (), and excess isentropic compressibility () were assessed using experimentally measured data of density () and ultrasonic speed () at the T = 298.15 K to 318.15 K and at pressure 0.1 MPa. Utilizing the values, the partial () and apparent molar volume () were also derived. The for these systems follow the pattern: n-butanol < iso-butanol < sec-butanol whereas the order for binary systems: n-butanol > iso-butanol > sec-butanol. As temperature increases, the become more negative, whereas the values were less positive. The RK polynomial equation is employed to corroborate the computed excess and deviation property data. Furthermore, the and values were interpreted by FTB model, PFP theory and ab-initio approach