The enthalpies of dilution Of aqueous Solutions of N-acetyl-N'-methyl-L-glycinamide (AcGlyNHCH(3)), N-aceryl-N'-methyl-L-alpha-alaninamide(AcAlaNHCH(3)), N-acetyl-N'-methyl-L-alpha-valinamide(AcVaINHCH(3)), N-acetyl-N'-methyl-L-alpha-leucinamide (AcLeuNHCH(3)) (BACHEM) and N-acetyl-N'-methyl-L-alpha-serinamide (AcSerNHCH(3)), N-acetyl-N'-methyl-L-alpha-threonibamide (AcThrNHCH(3)), in water at 298.15 K have been measured. These data were used to calculate the homogeneous enthalpic pair interaction coefficients based on McMillan-Mayer's theory. (c) 2009 Elsevier B.V. All rights reserved.