Thermodynamics of liquid mixtures containing ethyl methylthiomethyl sulfoxide: V. Excess enthalpies of (deuterochloroform + methyl ethylthiomethyl sulfoxide), (deuterochloroform dimethyl sulfoxide) and (deuterochloroform + chlorof

摘要: Abstract The molar excess enthalpies HmE of the title mixtures have been determined by using a twin-microcalorimeter heat-conduction type which requires only 10 cm3 each component liquid for series runs over whole range mole fractions. CDCl3 + CHCl3 is nearly athermal and its maximum value 9 J mol−1. HEm CDCl3(1) CH3SOCH2,SCH3(2) DMSO(2) are exothermic. minimum values −2.27 kJ mol−1 at x2 = 0.4 former mixture −2.91 latter. An equilibrium constant K1 expressed in terms fractions standard enthalpy ΔH1XXX formation 1:1 associated complex between CH3SOCH2SCH3 evaluated to be 3.8 (101325Pa) −6.6 mol−1, assuming an ideal CDCl3, their 2:1 complexes. enthalpic stabilization on hydrogen bonding molecules smaller than that about 23%.