Orthobaric liquid densities of trichlorofluoromethane, dichlorodifluoromethane, chlorodifluoromethane, 1,1,2-trichlorotrifluoroethane, 1,2-dichlorotetrafluoroethane, and of the azeotropic mixture of (chlorodifluoromethane + chloropentafluoroethane) between 203 and 463 K

Abstract The orthobaric liquid densities of six halogenated hydrocarbons: trichlorofluoromethane (CCl 3 F), dichlorodifluoromethane (CCl 2 F 2 ), chlorodifluoromethane (CHClF 2 ), 1,1,2-trichlorotrifluoroethane (CCl 2 FCClF 2 ), 1,2-dichlorotetrafluoroethane (CClF 2 CClF 2 ), and of (0.6321CHClF 2 + 0.3679CClF 2 CF 3 ), an azeotropic mixture, have been measured. Measurements were carried out with a magnetic densimeter for temperatures from 203 K up to a temperature close to the critical. An accuracy of ±0.1 per cent except for the results at temperatures above 423 K was confirmed by examining the present measurements for orthobaric (liquid + gaseous) water. The temperature dependence of the orthobaric liquid density has been correlated analytically on the basis of the present results and the more reliable of the reported measurements critically evaluated by the present authors.