Molar excess enthalpy (HmE) for various {alkanolamine (1) + water (2)} systems at T = (298.15, 313.15, and 323.15) K

The molar excess enthalpies (HmE) 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 HmE values are correlated as a function 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 HmE 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.