We have made new measurements of excess heat capacities and excess volumes of mixtures of chloroform and dioxane. In combination with published vapor pressures and excess enthalpies the results have been analyzed using the ideal associated solution model to yield K, Δ H θ, ΔC p θ, and Δ V θ for the formation of AB and A2B complexes. It is demonstrated that the ideal associated solution model is consistent with all of the ...