Abstract
PARIS.
Academy of Sciences, August 10.—M. A. Cornu in the chair.—Researches on cyanic acid, by M. Berthelot. By studying the reaction between acetic acid and potassium cyanate it was found to be possible to separate the heat evolved by the simple replacement of the cyanic by acetic acid, from the heat evolved in the subsequent decomposition into ammonia and carbon dioxide. The value thus found for the heat of neutralisation of cyanic acid (12˙25 calories) was confirmed by the observation that no reaction takes place between potassium cyanate and boric acid (heat of neutralisation, 11˙6 calories).— Researches on the volatility of lævulic acid, by MM. Berthelot and André. Lævulic acid is slightly volatile in vacuo at ordinary temperatures. Analysis of the residual acid showed that its composition was not quite the same as the original acid, possibly owing to the formation of an anhydride.
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Societies and Academies. Nature 54, 384 (1896). https://doi.org/10.1038/054384a0
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DOI: https://doi.org/10.1038/054384a0