Excess Enthalpies of Some Nitrile Compounds + Methyl Methylthiomethyl Sulfoxide or + Dimethyl Sulfoxide at 298.15K

抄録

Excess enthalpies of binary mixtures between each of acetonitrile, propionitrile, butyronitrile, pentanenitrile and benzonitrile + methyl methyithiomethyl sulfoxide (MMTSO) and + dimethyl sulfoxide (DMSO) have been determined at 298.15K. All mixtures showed positive enthalpy change over the whole range of mole fractions except acetonitrile + DMSO over 0.95 in mole fraction of DMSO.
Partial molar enthalpies of the mixtures of acetonitrile (1) + DMSO (2) around 0.65 in mole fraction have maximum of H^E₁ and minimum of H^E₂. Linear relations are obtained between limiting excess partial molar enthalpies and (μ₁²μ₂²)(r₁+r₂)^-6 except the mixtures containing for benzonitrile. However limiting excess partial molar enthalpies of the mixtures of aromoatic compounds + MMTSO or + DMSO showed good relation with (α₂μ₁²+α₁μ₂²)(r₁+r₂)^-6.