A THERMODYNAMIC STUDY OF GASEOUS OXIDES (thesis)
Abstract
This thesis is primarily a study of the gaseous state of magnesium oxidee Vapor pressure measurements on the solid oxide show that the solid vaporizes mainly into molecular species.Spectroscopic experiments have been conducted and have shown' that the known gaseous 12 electronic state of MgO is not the principal vaporizing specie.A study of the ultraviolet bands, produced by magnesium burning iri air, prove the ground electronic level of the molecule involved in this transition is more important than the 1% state of MgO.Within experimental uncertainty the heat of sublimation obtained from vapor pressure measurements agrees with a spectroscopically determined heat of sublimation of the unknown specie involved, in the ultraviolet transition.The dissociation energy of SnO has been determined by combining the heat of formation of ShO and a redetermined value of the heat of sublimation of tino The dissociation energy obtained thermochemically agrees with a linear Birge-Sponer extrapolation to the ground state atoms.
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