Enthalpies of dilution of amino alcohols in aqueous solutions at 298.15 K

The enthalpies of dilution of aqueous solutions of the amino alcohols: 3-amino-1-propanol, (RS)-1-amino-2-propanol, (RS)-3-amino-1,2-propanediol, and 1,3-diamino-2-propanol were measured as a function of concentration at 298.15 K using a Thermal Activity Monitor (TAM). The results of the experimental measurements were treated according to the McMillan-Mayer theory, to obtain the enthalpic homogeneous interaction coefficients. The pair interaction coefficient h(xx) shows a clear dependence on the position and number of polar groups. The enthalpic coefficients are discussed in terms of the molecular interaction between solvated solute molecules.