Excess molar enthalpies for binary and ternary mixtures containing cyclic ether, 2-methylaniline and aromatic hydrocarbons

Excess molar enthalpies, HijkE, of 1,4-dioxane (i) + 2-methylaniline (j) + benzene or methylbenzene or 1,3-dimethylbenzene or 1,4-dimethylbenzene (k) ternary and HikE of 1,4-dioxane (i) + 1,3-dimethylbenzene or 1,4-dimethylbenzene (k) binary mixtures have been measured as a function of composition at T = 308.15 K using 2-drop calorimeter. The resulting data have been fitted to Redlich–Kister equation to evaluate binary and ternary parameters along with their standard deviations. The observed data have been analyzed in terms of (a) Graph theory (which involve the topology of the mixtures constituents), and (b) Prigogine–Flory–Patterson theory. It has been observed that HikE and HijkE values predicted by Graph theory compare well with their corresponding experimental values. However, although HijkE values calculated by Prigogine–Flory–Patterson theory are of same sign, the qualitative agreement is not impressive.

► Excess molar enthalpies of ternary and binary mixtures have been measured at 308.15 K.
► The HikE and HijkE data have been fitted to Redlich–Kister equation to evaluate parameters.
► The observed data have been analyzed in terms of (a) Graph theory and (b) PFP theory.
► The HikE and HijkE values predicted by Graph theory compare well with their observed values.