Abstract
To predict heats of mixing for systems containing alkanes, aromatic hydrocarbons, alcohols, ketones, esters, and trichlorides, by using ASOG group contribution method, the group pair parameters which are fundamental for the prediction have been determined for nine group pairs constituted by six groups CH2, ArCH, OH, CO, COO, CCl3 in the temperature range of 298.15 to 318.15K. By using the group pair parameters determined, heats of mixing have been predicted for binary and ternary systems constituted by the six groups using ASOG with relatively good accuracy.