Bubble temperatures at 94.7 kPa, over the entire composition range, are measured for the binary mixtures formed by cyclohexanone with acrylonitrile, carbontetrachloride, 2-cyanopyrazine, cyclohexane and 2-methylpyrazine. A Swietoslawski-type ebulliometer is used for the measurements. The liquid phase mole fraction-bubble temperature data are found to be well represented the Wilson model. Activity coefficients calculated from the model are presented. (c) 2005 Published by Elsevier B.V.