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

AUTOR(ES)

Luciane D Agostini

DATA DE PUBLICAÇÃO

2003

RESUMO

The aim of this work was to obtain experimental data of the excess enthalpies versus composition at several temperature for binary solutions of a1cohol + acetonitrile, and to apply the solution model ERAS. The behavior of excess enthalpy was analyzed according to intermolecular forces. The studied system were l-heptanol/acetonitrile and l-octanol/acetonitrile under atmosphere pressure and at 298.15 313.15 and 323.15K. The data of excess enthalpy were obtained using an adiabatic calorimeter. The curves of excess enthalpy plotted against mole ftaction show positive values over the whole composition range in the temperature range studied, and also it was observed that the excess enthalpies increased with the length of the a1cohol chain and with increasing the temperature. The model is able to describe well main features behavior of the curves of excess enthalpy for the studied systems

ASSUNTO(S)

calorimetria entalpia solução (quimica) modelagem de dados

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