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- W53487952 abstract "BS>The heat content of sodium borohydride, NaBH/sub 4/, and of potassium borohydride, KBH/sub 4/, was measured, relative to that at 0 deg C, at 50-degeee intervals from 0 to 400 deg C. The so-called drop'' method was used with a precision Bunsen ice calorimeter and a silver-core furnace. Preliminary tests showed that spontaneous decomposition of these compounds is very slow at temperatures up to 400 deg C. Measurements were made on two samples of each compoumd, those of sodium borohydride having been obtained from different sources. Smoothed values of the heat-content function, heat capacity, entropy, and the Gibbs free-energy function were derived from the data. These values were increased by 0.5 percent to correct for the presence of an estimated 1 percent of the corresponding metaborate in each sample. The heat capacity of sodium borohydride increases monotonically with temperature in the range investigated; that of potassium borohydride passes through a point of inflection, which suggests that there may be a broad second-order transition in the neighhorhood of room temperature. (auth)" @default.
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- W53487952 date "1958-02-01" @default.
- W53487952 modified "2023-10-02" @default.
- W53487952 title "Heat content of sodium borohydride and of potassium borohydride from 0-degrees-C to 400-degrees-C" @default.
- W53487952 doi "https://doi.org/10.6028/jres.060.014" @default.
- W53487952 hasPublicationYear "1958" @default.
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