The molar excess enthalpies (H-m(E)) for 2-{(2 aminoethyl)amino}ethanol (AEEA), 3-amino-1-propanol (AP), 2-(methylamino)ethanol (MAE), 1-amino-2-propanol (MIPA), and N-N-dimethylethanolamine (DMEA) in water are reported at three different T=(298.15, 313.15, and 323.15) K and over the entire range of mole fractions. The experimentally measured H-m(E) values are correlated as a function m of mole fractions using the Redlich-Kister (RK) equation. The molar enthalpies of alkanolamines and water at infinite dilutions are determined from the RK coefficients. The experimentally measured H-m(E) values are modeled using the following solution theory models: NRTL (non-random two liquid), UNIQUAC (UNIversal QUAsi Chemical), and the modified UNIFAC (UNIversal Functional groups Activity Coefficient, (Dortmund)) model. (c) 2007 Elsevier Ltd. All rights reserved.