EXCESS VOLUMES AND ISENTROPIC COMPRESSIBILITIES OF MIXTURES OF 1,2-DICHLOROBENZENE + ISOPROPYL-ALCOHOL, + ISOBUTYL ALCOHOL, AND + ISOPENTYL ALCOHOL AT 303.15-K

Excess volume and deviation in isentropic compressibility were measured for mixtures of 1,2-dichlorobenzene with isopropyl alcohol, isobutyl alcohol, and isopentyl alcohol at 303.15 K. Excess volume exhibits inversion in sign in the three mixtures. This is similar to the trend between excess volume and composition observed in the mixtures of 1,2-dichlorobenzene with 1-propanol, 1-butanol, and 1-pentanol. However, the negative excess volume becomes dominant in mixtures of 1,2-dichlorobenzene with isopropyl alcohol and isobutyl alcohol. Deviation in isentropic compressibility is negative over the whole range of composition and is similar to that observed for the mixtures of 1,2-dichlorobenzene with the corresponding 1-alkanols. However, a large negative deviation is observed in mixtures of 1,2-dichlorobenzene with the isoalcohols.