Saturated vapor pressures have been measured for liquid 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4dichlorobenzene, and 1,2,4-trichlorobenzene by precision comparative ebulliometry over an approximate pressure range from 6 to 105 kPa. The relative error in pressure is estimated to be less than or equal to (0.05% of the measured value and the absolute error in temperature is estimated at less than or equal to (0.01 K on ITS-90. The results have been represented by the Antoine and Wagner-type equations within experimental uncertainties and compared with the data so far available in the literature. On the basis of the present and previous measurements, vapor pressure equations for the chlorobenzenes covering the entire range of liquid existence have been constructed and discussed.
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