Abstract The temperature dependences of molar enthalpies of vaporization of four chlorofluoroethers were measured calorimetrically with an accuracy of 0.3 per cent. The compounds and the temperature ranges of measurement were: 2-chloro-1, 1, 2-trifluoroethyl methyl ether, 298.15 to 343.15 K; 2-chloro-1, 1, 2-trifluoroethyl isopropyl ether, 298.15 to 328.15 K; 2-chloro-1, 1, 2-trifluoroethyl butyl ether, 298.15 to 368.15 K; 2-chloro-1, 1, 2- ...