THE DETERMINATION OF THE SATURATION VAPOR PRESSURE OF SOLID HYDROXYLAMINE USING A PISTON PRESSURE GAUGE
Open Access
- 1 August 1965
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 43 (8) , 2157-2161
- https://doi.org/10.1139/v65-291
Abstract
The saturation vapor pressure of solid hydroxylamine has been determined at temperatures from −12 to 7° C and found to fit the equation[Formula: see text]From this have been calculated several thermochemical quantities, including a heat of sublimation of 15.34 kcal/mole, and a dissociation energy of 61.3 kcal/mole for the NH2—OH bond. Vapor density measurements showed that hydroxylamine vapor consisted of single molecules of NH2OH at 0.27 Torr and 25 °C.A novel pressure gauge used in the measurements is described. Pressures were determined with an accuracy of ±0.001 Torr by measuring the force acting on a piston, moving freely in a glass cylinder, suspended on the arm of a torsion balance.Keywords
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