Abstract
The heat of mixing of hydrogen peroxide and water and the heat of vaporization of the mixtures were measured over a wide concentration range at 0 °C. with a Bunsen ice calorimeter and at 26.9° with a diphenyl ether calorimeter. The heat capacities of the solutions were determined between these two temperatures. Similar measurements were carried out on the corresponding deuterium compounds. The heat of decomposition of hydrogen peroxide catalyzed by colloidal platinum was also measured at 26.9° as a function of concentration. Correlation of all the results leads to the following recommended values for the thermochemical properties of the pure peroxides in the liquid state at 25 °C.[Formula: see text]A number of related functions are given for convenience in recalculating these quantities to other temperatures. Apart from their practical value the new data are of interest in connection with molecular association and hydrogen bonds.
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