Excess molar enthalpies, H-E, 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 H-E values are all positive (endothermic) for these binary mixtures over the entire composition range. The maximum H-E values are in the range 386.6 J.mol(-1) to 674.0 J.mol(-1) and are exhibited at about x(i) = 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 H-E 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.