Abstract
Excess molar enthalpies, HE, for the binary mixtures of dimethyl carbonate with o-xylene, m-xylene, p-xylene, ethylbenzene, or ethyl benzoate have been measured by using a flow-type isothermal microcalorimeter at 298.15 K under atmospheric pressure. The experimental HE values are all positive (endothermic) for these binary mixtures over the entire composition range. The maximum HE values are in the range 386.6 J·mol-1 to 674.0 J·mol-1 and are exhibited at about xi = 0.5, except for the systems containing ethylbenzene and ethyl benzoate. The experimental results were represented accurately by the Redlich−Kister polynomial equation. These new HE data were also correlated with the Peng−Robinson and the cubic chain-of-rotators (CCOR) equations of state. With two adjustable interaction parameters, the CCOR equation represents the excess enthalpies of these five binary systems satisfactorily.
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