Thermodynamics and excess properties of {trichloromethane + amines} at (۲۹۳.۱۵, ۲۹۸.۱۵, ۳۰۳.۱۵ and ۳۰۸.۱۵) K. Experimental results and application of the Flory theory.

Thermal expansion coefficients Į , and their excess values ĮE, and isothermal coefficient of pressure excess molar enthalpy (H mE / P)T,x of the binary and ternary mixtures formed by Trichloromethane + n-butyl amine , + s-butyl amine, and + diethyl amine were measured at (۲۹۳.۱۵,۲۹۳.۱۵, ۳۰۳.۱۵ and ۳۰۸.۱۵) K for the liquid region and at ambient pressure . The thermal expansion coefficients Į , and their excess values ĮE, and isothermal coefficient of pressure excess molar enthalpy (H mE / P)T,x ˬ calculated from experimental densities [۱-۳]. Negative values of ĮE or positive value of (H mE / P)T,x for binary mixtures may be attributed to strong chemical or specific interactions between the components present in the mixtures or to structural contributions arising from the geometrical fitting of one component into the other due to differences in the molar volumes and free volume between unlike molecules.

کلیدواژه ها:

Thermal expansion coefficients ، Excess thermal expansion coefficients ، Isothermal Coefficient of pressure excess molar enthalpy ، Flory theory.