Excess Molar Enthalpies of Water + Primary Alkanolamines with a Common N–C–C–O Skeleton

The excess molar enthalpies of binary mixtures of 2-amino-ethan-1-ol (MEA) and 1-aminopropane-2-ol (MIPA), 2-amino-butan-1-ol (ABU), and 2-amino-2-methyl-propan-1-ol (AMP) with water were measured versus temperatures from 318.15 to 393.15 K and at a pressure of 0.5 MPa. The Redlich–Kister equation was used to fit the experimental data and to estimate the molar enthalpies of alkanolamine and water at infinite dilution. The effect of the substitution of alkyl groups on the carbon of the hydroxyl function is discussed on the basis of molecular simulation results published on alkanolamines earlier.