SOLUBILITY OF CCL2F2, CCLF3, CF4 AND C-C4F8 IN H2O AND D2O AT 288-K TO 318-K AND 101.325-KPA - THERMODYNAMICS OF TRANSFER OF GASES FROM H2OTO D2O

Using a computer controlled version of the Ben-Naim/Baer apparatus, th e solubilities of dichlorodifluoromethane (CCl2F2, Freon-12), chlorotr ifluoromethane (CClF3, Freon-13), and octafluorocyclobutane (C-C4F8, F reon 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. T he precision of the measurements was 0.5 - 1.0 %. The experimental dat a were processed using rigorous thermodynamic methods and were fitted to the Clarke/Glew/Weiss equation. Changes in the thermodynamic proper ties on solution were calculated from the smoothing equations. The the rmodynamic transfer functions of gases from H2O to D2O were calculated . The changes induced by the solvation process on the structure of wat er were estimated from the Gibbs energy of transfer and the difference in the hydrogen bond energies for D2O and H2O.