Thermodynamic properties of binary mixtures containing thiaalkanes

Enthalpies of mixing, HE, at 298.15 K were measured for binary R2S + n-CmH2m+2 mixtures (R = CH3, C2H5, n-C3H7, n-C4H9, n-C7H15; m = 6, 8, 12, 16) using a B.C.P. (Anon) isothermal differential microcalorimeter equipped with a special flow mixing unit. The experimental data are interpreted quantitatively in terms of surface interchange enlhalpies in the zero approximation. Theoretical and experimental HE values compare fairly well. However, the deviations show a regular trend which may be explained qualitatively by an endothermic disordering contribution