Excess parameters of binary mixtures oftetrahydro- furfurylalcohol with cyclopentanol and 1-pentanol at (293.15, 303.15 and 313.15k)‎

Abstract EN

Density and viscosity of the binary liquid mixtures of (THFA + c^o^ntanol, THFA + 1-pentanol and cyclopentanol + 1-pentanol) have been measured as a function of composition range at 293.15, 303.15, 313.15K.

From density and viscosity data, the values of excess molar volume (Ve), the excess viscosity (nE) and excess Gibbs free energy of activation flow (AG*E) were calculated and correlated by the Redlich-kister type fonction to derive the coefficients and estimate the standard error.

Deviations from ideal behavior are discussed from the point of view of the molecular interactions present between the unlike molecules.

As for all the binary mixtures studied the excess molar volume showed a positive deviation from ideal behavior at the three teperatures studied except for two points was negative at 293.15K for the system THFA+ cyclopentanol, while tile excess viscosity and excess Gibbs free energy showed a negative from ideal behavior at the three temperatures.

Introductions A knowledge of excess thermodynamic properties ©f m^tic©mp©nent liquid systems is essential in many practical problems concerning heat transport, mass transport, fluid flow, etc.

[1, 2, 3],The thermodynamic excess functions are of great importance in helping to comprehend the nature and extent of the patterns of molecular aggregation that exist in a real mixture, resulting from irtermolecular iitferactions.

In fact, the irteraction between the molecules can be established from a study of characteristic sudden departure from ideal behavior of some physical properties volume, viscosity, dielectric constant, refractive index, and others that reflects the real behavior of solutes in solvents.

[4, 5, 6],Alcohols are organic compound which is widely used within the chemical industry.

Alcohols are in use as fuel, perfumes, cosmetics, paints, drugs, gums, resins, explosives, fats, waxes, plastics, rubber, lacquers, ^^amishes,det^gents, etc.

[7, 8],