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Saturday, August 1, 2020 | History

3 edition of Heats and Free Energies of Formation of Germanium Dioxide. found in the catalog.

Heats and Free Energies of Formation of Germanium Dioxide.

United States. Bureau of Mines.

Heats and Free Energies of Formation of Germanium Dioxide.

by United States. Bureau of Mines.

  • 185 Want to read
  • 21 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 6034
ContributionsMah, A., Adami, L.
ID Numbers
Open LibraryOL21742959M

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. These include thermodynamic properties, enthalpies of formation, Gibbs free energy of formation, entropies and heat capacities, and vii Patnaik_FM_ 11/11/02 PM Page vii thermal properties such as thermal conductivities, coefficient of linear expan- sion, heat of fusion, and the heat .

J A Joens, "The Dissociation Energy of OH(X2Pi3/2) and the Enthalpy of formation of OH (X2Pi3/2), ClOH, and BrOH from Thermochemical Cycles" J. Phys. Chem. A , , Man JA Manion "Evaluated Enthalpies of Formation of the Stable Closed Shell C1 and C2 Chlorinated Hydrocarbons" J. Phys. Chem. Ref. Data 31(1), , B. Glass Formation in Binary Phosphate Systems 1. Regions of Glass Formation 2. The Structure of Phosphate Glasses 3. Paper Chromatography of Phosphate Glasses 4. Devitrification Kinetics of Sodium Metaphosphate Glass 5. The Role of B2O3 and Al2O3 in Phosphate Glasses 6. GERMANIUM DIOXIDE AND GERMANATE GLASSES A. Germanium Dioxide 1. Structure.

Many germanium reactive intermediates are known: germyl free radicals, germylenes (similar to carbenes), and germynes (similar to carbynes). [44] [45] The organogermanium compound 2-carboxyethylgermasesquioxane was first reported in the s, and for a while was used as a dietary supplement and thought to possibly have anti-tumor ciation: /dʒərˈmeɪniəm/ ​(jər-MAY-nee-əm). gonal germanium dioxide into the high temperature hexagonal form. The free energy of formation of hexagonal GeO2 calculated from these results 4,s is good agreement with that obtained from thermal data.6"~ The heats of fusion of hexagonal GeO2 (Ref. 5) and germanium metal 9 .


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Heats and Free Energies of Formation of Germanium Dioxide by United States. Bureau of Mines. Download PDF EPUB FB2

Additional Physical Format: Online version: Mah, Alla D. Heats and free energies of formation of germanium dioxide (OCoLC) Material Type:. Article Views are the COUNTER-compliant sum of full text article downloads since November (both PDF and HTML) across all institutions and by: The heats of fluorination of germanium and of hexagonal and tetragonal germanium dioxide have been determined calorimetrically by reacting them with fluorine gas.

The heat of transition of vitreous into hexagonal germanium dioxide has been determined by solution calorimetry in. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link) http Author: Alla D.

Mah and Lanford H. Adami. Vib. sym. Approximate type of mode cm-1 Med. Method References; Σ g +: 1: GeO s-stretch: CH 4: Ra: Friesen, Junker, et al., Π u: 2: Bend: Ar. Standard molar Gibbs free energies of formation of the tetragonal and hexagonal forms of germanium dioxide Author links open overlay panel C O'Neill Show moreCited by: 6.

Mah AD, Adami LH () Heats and free energies of formation of germanium dioxide. U.S. Bureau Mines Rept Inv Google Scholar Majumdar AJ, Roy R () Test of the applicability of the Clapeyron relationship to a few cases of solid-solid by: Standard molar Gibbs free energies of formation of the tetragonal and hexagonal forms of germanium dioxide.

The Journal of Chemical Thermodynamics18 (5), DOI: /(86) Charles E. Holley, Elmer J. by: Germanium in various forms is absorbed from the gastrointestinal tract and excreted in the urine (68%) and the feces (%) within 24 hours of administration.

It is fairly equally distributed between plasma and red blood cells but is not bound to plasma proteins. Germanium may be transported in the blood, unbound to protein, since it leaves the bloodstream in a few hours. Standard Heats and Free Energies of Formation and Absolute Entropies of Elements and Inorganic Compounds.

Mah, Alla D.: Heats and free energies of formation of germanium dioxide / (Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, ), also by Lanford H. Adami (page images at HathiTrust) Mah, Alla D.: Heats and free energies of formation of oxides of vanadium / ([Washington, DC]: U.S.

Dept. of the Interior, Bureau of Mines, [ Standard Free Energies of Formation Alan D. Earhart 11/7/ Substance ΔG° f (kJ/mol) Substance ΔG° f (kJ/mol) Substance ΔG° f (kJ/mol) AgCl(s) CaSO4(s) N 2H 4(g) + Al 2O 3(s) Fe 2O 3(s) N 2H 4(l) + CHCl 3(g) HBr(g) N 2O(g) + CH 2Cl 2(g) HCl(g) N 2O 4(g) + CH 2O(g) HF(g) NFile Size: 63KB.

∆fH° Standard molar enthalpy (heat) of formation at K in kJ/mol ∆fG° Standard molar Gibbs energy of formation at K in kJ/mol S° Standard molar entropy at K in J/mol K Cp Molar heat capacity at constant pressure at K in J/mol K The standard state pressure is kPa (1 bar).File Size: KB.

Enthalpy measurements have been made on tetragonal germanium dioxide in the temperature range to K and thermodynamic properties have been derived from the results.

The heat capacity of tetragonal germanium dioxide is now known from 5 to K. The heat capacity of tetragonal germanium dioxide has been compared with reported values for the hexagonal variety, and the Cited by:   A Critical Assessment of Thermodynamic and Phase Diagram Data for the Ge-O System.

Authors; Germanium XXXIX, The Polymorphism of Germanium Dioxide, J. Ceram. Heats and Free Energies of Formation of Germanium Dioxide. Bureau of Mines Report of Investigations, Google Scholar.

Author: A. Dinsdale, A. Akhmetova, A. Khvan, N. Aristova. Formation and stability of germanium oxide induced by atomic oxygen exposure Article in Materials Science in Semiconductor Processing 9(4) August. Rossini] Free Energy oj Water and Oarbon Monoxide and mixtures of oxygen and carbon dioxide, the values were calculated from the published data of Rossini and Frandsen [5] on (dE/dP)T at 28° C and their unpublished data on theP-V-Trelations of mixtures of oxygen and carbon dioxide.

Germanium dioxide, also called germanium oxide, germania, and salt of germanium, is an inorganic compound with the chemical formula Ge O 2. It is the main commercial source of germanium. It also forms as a passivation layer on pure germanium in contact with atmospheric al formula: GeO₂.

A quantity of energy, equal to the difference between the energies of the bonded atoms and the energies of the separated atoms, is released, usually as heat.

That is, the bonded atoms have a lower energy than the individual atoms do. When atoms combine to make a compound, energy is always given off, and the compound has a lower overall energy. Abstract.

The thermodynamic stability of tetragonal germanium dioxide has been characterized by measurements of the equil ibrium Hf/H20 ratios in the tem-perature range ~ Results are extrapolated to ~ using estimated heat capacities, to give the standard thermal parameters, and to the tetra-gonal-hexagonal transition point to give the free energy of formation of both modifications Author: M.

Faktor and J. Carasso. Results are extrapolated to °K using estimated heat capacities, to give the standard thermal parameters, and to the tetragonal‐hexagonal transition point to give the free energy of formation.Although germanium sesquioxide is the safer variety, even germanium dioxide, the nonorganic type, has been shown to be safe at low levels.

This is not true at high levels, however. The Journal of Toxicological Science reports on accumulation of germanium dioxide in the tissues of a long-term user who died of acute renal failure.Compound State ΔH f ° (kJ/mol) ΔG f ° (kJ/mol) S° (J/mol K) Class; Methane: g alkane: Ethane: g alkane: Propane: g.