SOLUTION MOLAR ENTHALPIES FOR 1 -BUTYL-3-METHYLIMIDAZOLIUM BROMIDE AND 1 -BUTYL-3-METHYLIMIDAZOLIUM CHLORIDE + 1-BUTANOL BINARY SYSTEMS IN THE RANGE OF (303.15 - 318.15) K

摘要

Experimental mixing enthalpies of solutions for 1-butyl-3-methylimidazolium bromide ([bmim]Br) and l-butyl-3-methylimidazolium chloride ([bmim]Cl) + 1-butanol binary systems measured by using a SETARAM C80 3D calorimeter with reversal mixing mechanism over the composition range from m 0.0075 to 1.1625 mol kg_(-1) of ionic liquid (IL) at temperatures of 303, 310 and 318 K and atmospheric pressure are reported. The data have been correlated adequately with Archer and Rard (1998) model for electrolyte systems. The absolute mean relative deviations obtained in molar enthalpy of solution correlation were situated between 2.3 % and 5.1 % for the bromide compound, while for the chloride one they were between 15.8 % and 21.8 %. The molar enthalpies of solution at infinite dilution, the apparent relative molar enthalpies for the solutes and relative molar enthalpies L for the mixtures were determined according to this model. The physical interactions in the two ionic liquids (ILs) alcoholic solutions are briefly analyzed, based on the obtained results.