Thermodynamic investigation of molecular interactions in 1,3-dioxolane or 1,4-dioxane + benzene or toluene + formamide or +N,N-dimethylformamide ternary mixtures at 308.15 K and atmospheric pressure

Excess molar volumes, V ^E ₁₂₃ of 1,3-dioxolane or 1,4-dioxane (1) + benzene or toluene (2) + formamide or + N,N-dimethylformamide (3) ternary mixtures at 308.15 K and at atmospheric pressure have been determined dilatometrically over the entire composition range. The excess molar volumes data of these ternary systems were fitted to the Redlich-Kister equation. The data have been analyzed in terms of Graph theory (model) to understand the nature and strength of molecular interactions existing in these mixtures. It has been observed that V ^E ₁₂₃ values predicted by Graph theory compare well with their corresponding experimental values.