Excess molar enthalpies, H-m(E), and excess molax volumes, V-m(E), have been measured at T = 298.15 K and normal atmospheric pressure for the binary 1,2-dichlorobenzene + (benzene, hexane, or 1-chlorohexane) and 1,3-dichlorobenzene + (benzene, hexane, or 1-chlorohexane) systems using a Calvet microcalorimeter and a vibrating tube densimeter, respectively. The experimental values of H-m(E) and V-m(E). of the mixtures are found to be positive or negative depending on the type and magnitude of the interactions involved in each process. The results are compared with those found in the literature.