Estudo experimental do volume molar em excesso de soluções liquidas binarias contendo cloroformio e aminas a diferentes temperaturas e a pressão atmosferica / Experimental study of excess molar volume of binary liquid solutions containing chloroform and amines at different temperatures and at atmospheric pressure

AUTOR(ES)

Jucelio Gobi Magalhães

DATA DE PUBLICAÇÃO

2007

RESUMO

This work consists on a experimental study of excess molar volume Vm of binary liquid solutions of chloroform + n-butylamine, or + s-butylamine, or + diethylamine, or + triethylamine at 288,15, 293,15, 298,15, 303,15 K as a function of composition and at atmospheric pressure, with the objective to study the possibles physical, chemical and structural effects in these systems. The experimental data were adjusted to a Redlich-Kister type equation, and the results were used to determine other thermodynamic functions, as, partial molar volume, excess partial molar volume, apparent molar volume and total apparent molar volume. The Vm was determined indirectly through mechanical oscilation densitometry technique. For the four systems studied, at all temperatures the data of Vm are negative and become more negative with the increasing of the temperature. The points of minimum on the plots of Vm versus molar fraction of chloroform are in between 0,35 and 0,50, depending of the system. The partial molar volumes at infinite dilution of chloroform and of the amines are negative on every studied temperatures, and become more negative with the increasing of the temperature. The results suggest a pronounced structural effect (molar and free volume) on the value of Vm , as well as an indication of the existence of strong interactions between chloroform and amine, wich is more evident in the system containing triethyamine

ASSUNTO(S)

cloroformio chloroform aminas amines volume molar em excesso excess molar volume

Documentos Relacionados

• Estudo experimental e correlação da entalpia em excesso molar de soluções líquidas binárias contendo 1-nonanol ou 1-decanol e acetonitrila a diferentes temperaturas e pressão atmosférica utilizando os modelos ERAS e PFP
• Experimental study on the excess molar enthalpy of binary liquid solutions containing 1-pentanol + acetonitrile and 1-hexanol + acetonitrile at different temperatures and atmospheric pressure and correlation of data using PFP and ERAS models
• Efeito da hidratação hidrofobica e da interação hidrofobica sobre o volume molar em excesso de soluções liquidas binarias de agua-alcool a diferentes temperaturas a pressão atmosferica : estudo experimental e modelagem
• Experimental study and modeling for excess molar enthalpy of liquid solutions containing electrolytes
• Estudo experimental e modelagem da entalpia em excesso de soluções liquidas binarias contendo 1-heptanol/acetonitrila e 1-octanol/acetonitrila a 298.15, 313,15, 323,15 K e pressão atmosterica