The characteristics of a xenon resonance lamp were studied, using carbon dioxide as an actinometer, to determine the influence of the xenon pressure in the lamp on the intensity of the 1470A radiation. The xenon sensitized photosynthesis of ammonia was studied both in static and in flow systems. No ammonia could be detected. Some experiments on the photolysis of ammonia at 1470A are reported and discussed. The present work furnishes the first direct chemical evidence rejecting the value of 171.3 kcal per mole as the dissociation energy of nitrogen.
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Wijnen et al. (1953) studied this question.
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