|Author||Ondrejcin, R. S. ♦ Garrett, T. P. (Jr.)|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||CHEMISTRY ♦ ACTIVATION HEAT ♦ ATMOSPHERE ♦ DECOMPOSITION ♦ ENTROPY ♦ HEATING ♦ MEASURED VALUES ♦ NITROGEN ♦ PRESSURE ♦ REACTION KINETICS ♦ TEMPERATURE ♦ URANIUM TRIOXIDE ♦ URANYL NITRATES ♦ VACUUM|
|Abstract||The thermal decomposition of anhydrous uranyl nitrate followed first- order kinetics in vacuo at temperatures from 250 to 450 deg . Amorphous uranium trioxide was the only nonvolatile product of decomposition. No intermediate compounds were observed. The thermal decomposition of uranyl nitrate dihydrate occurred as two independent reactions following first-order kinetics: dehydration to form anhydrous uranyl nitrate and denitration to form uranium trioxide. The decomposition was studied both in vacuo and at atmospheric pressure under nitrogen, at temperatures from 250 to 400 deg . Intermediate and final decomposition products were identified. The specific reaction-rate constants were measured for the dehydration and denitration reactions. From these data, the heats and entropies of activation were calculated. (auth)|
|Learning Resource Type||Article|
|Publisher Department||E.I. du Pont de Nemours & Co., Aiken, S.C.|
|Journal||Journal of Physical Chemistry|
|Organization||E.I. du Pont de Nemours & Co., Aiken, S.C.|
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