Using a computer controlled version of the Ben-Naim/Baer apparatus, the solubilities of dichlorodifluoromethane (CCl2F2, Freon-12), chlorotrifluoromethane (CClF3, Freon-13), and octafluorocyclobutane (C-C4F8, Freon C-318) in H2O and D2O were determined at four temperatures in the range 288 to 318 K and at a partial pressure of gas of 101.325 kPa. The precision of the measurements was 0.5 - 1.0 %. The experimental data were processed using rigorous thermodynamic methods and were fitted to the Clarke/Glew/Weiss equation. Changes in the thermodynamic properties on solution were calculated from the smoothing equations. The thermodynamic transfer functions of gases from H2O to D2O were calculated. The changes induced by the solvation process on the structure of water were estimated from the Gibbs energy of transfer and the difference in the hydrogen bond energies for D2O and H2O.