Excess molar enthalpies, H-m(E) of methyl isobutyl ketone + methanol, +ethanol, +propan- I -ol, +butan-l-ol, +pentan-l-ol, and +hexan-l-ol have been measured at 298.15 K and atmospheric pressure with a Parr 1455 solution calorimeter. Excess molar enthalpies, H-m(E) values are always positive and increase as the chain length of the alkan- I -ol is increased, showing maximum values varying from 882 (methanol) to 1510 J mol(-1) (hexan-l-ol). The maximum values were observed about 0.5-0.6 mole fraction of methyl isobutyl ketone (MIBK). The experimental results are discussed in terms of intermolecular interactions, particularly hydrogen-bonding interactions between like and unlike molecules. The experimental data were correlated by the Redlich-Kister equation and the two local-composition models (Wilson and NRTL). The correlation of excess enthalpy data in the systems using NRTL model provides good results. (C) 2004 Elsevier B.V. All rights reserved.