In a study of the reactions occurring in the electrodeless discharge in water vapor consistently high yields of hydrogen peroxide were obtained. A number of reactions have been studied and by a process of elimination a mechanism for the formation of hydrogen peroxide from hydroxyl has been suggested. In the course of some spectrographic investigations of the electrodeless discharge in water vapor some new bands, with heads at 3564 and 3328A, were observed which are probably due to an ionized hydroxyl. These bands were not present in the uncondensed electrode discharge but appeared in the condensed electrode discharge at low pressures.
The ratio of vapor pressures of H2O16 and HDO16 and of H2O16 and H2O18 have been determined at four temperatures between 11.25°C and 46.35°C. The ratio of vapor pressures of HDO16 are very nearly the geometric mean of the vapor pressure of H2O16 and D2O16. The vapor pressure of H2O18 varies from approximately 0.8 to 1.2 percent less than the vapor pressures of H2O16 for temperatures between 46.35°C and 11.25°C. The application of these to the separation of the hydrogen and oxygen isotopes by distillation is discussed. It seems possible that the hydrogen isotopes can be separated by the fractional distillation of water, but that the separation of the oxygen isotopes by this method will be considerably more difficult.
1) The vapor pressure equations of liquid and solid, normal deuterium were determined by comparison of the vapor pressure of deuterium with that of liquid, normal hydrogen between 13.9° and 20AO°K. The triple and boiling points of deuterium were found to be 18.58° and 23.5°K, respectively. (2) The changes with time in the vapor pressures of liquid hydrogen and liquid deuterium at 20.4°K, resulting from ortho-para conversions, were investigated. The rate of change of the vapor pressure of liquid deuterium resulting from its natural, self-conversion was found to be less than 1/40th of the natural rate of conversion for liquid hydrogen. (3) From the vapor pressure equations of deuterium and an equation of state, its latent heats were deduced by the use of the Clausius-Clapeyron equation. Two equations of state for deuterium were used: (a) the empirically determined equation for hydrogen, and (b) an equation deduced from an equation of state of hydrogen of a form required by the Bose-Einstein statistics by including the effect of mass in such
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