Densities of (2-butanol plus n-hexane plus 1-butylamine) at T=298.15 and T=313.15 K: excess and partial excess molar volumes and application of the ERAS model

Densities of {xCH(3)CH(OH)CH2CH3 + (1 - x)CH3(CH2)(4)CH3} at T = 298.15 K a nd T = 313.15 K, (xCH(3)CH(OH)CH2CH3 + (1 - x)CH3(CH2)(3)NH2) at T = 313.15 K, {xCH(3)(CH2)(4)CH3 + (1 - x)CH3(CH2)(3)NH2} at T = 298.15 K, and {x(1)C H(3)CH(OH) CH2CH3 + x(2)CH(3)(CH2)(4)CH3 + (1 - x(1) - x(2))CH3(CH2)(3)NH2} at T = 298.15 K and T = 313.15 K, have been measured. From these densities , excess molar volumes were calculated and fitted to the Redlich-Kister equ ation for the binary mixtures and to the Jasinski, Cibulka, Singh, Pintos a nd Calvo equations, for the ternary system. The partial excess molar volume s of each component in the mixtures have been determined. Several methods f or the prediction of excess properties of multicomponent systems from binar y systems data have been tested. Finally, the ERAS model has been used at T = 298.15 K to predict the excess molar volume of the ternary mixture. Qual itatively, the ERAS model gives an adequate representation of this system, with the shapes of both experimental and predicted curves being similar. (C ) 2000 Academic Press.