| Description |
ix, 115 leaves : illustrations, photographs ; 29 cm |
| Summary |
"The vapour pressure of germanium monosulfide (liquid) was determined by a boiling point method. An expression for the vapour pressure as a function of temperature was obtained and the heat of vapourization calculated. Using the heat of sublimation data obtained by other investigators, the heat of fusion was calculated. The thermodynamic properties, change of standard free energy([delta] F°) heat content([delta] H°) and entropy ([delta] S°); of germanium disulfide were determined by using an indirect method. The equilibrium H₂S/H₂O ratios are determined for the reaction: GeS₂(s) + 2H₂O(g) = GeO₂(s) + 2H₂S(g), in the temperature range of 410-560°C by using a flow method and extrapolating the values of H₂/H₂O ratios to zero flow rate. An expression for the standard free energy of the reaction as a function of temperature was obtained. Using the known values of standard free energy of formation of GeO₂(s), H₂S(g) and H₂O(g) an expression for the dissociation of germanium disulfide was calculated. A detailed description is given for the methods and the apparatus used for both the vapour pressure and equilibrium studies. The methods used for the preparation of the compounds GeS₂ and GeS and their properties are described. X-ray diffraction patterns are given for GeS₂ , GeS and GeO₂ phases"--Abstract, leaves i-ii. |
|
