| Composition and thermochemistry of silver bromide vapor. | |
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MedLine Citation:
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PMID: 16331919 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The mole fractions of AgBr and Ag3Br3 in the saturated vapor at 840 K have been evaluated from the vapor mass spectrum, by comparison with the corresponding spectrum of AgCl vapor, where the monomer/trimer ratio is known accurately from vapor molecular weight measurements. Combination of these results with new measurements of the vapor pressure of molten AgBr by the torsion-effusion method in the range 805-936 K yielded the third law enthalpies of vaporization and the standard enthalpies of formation DeltafH degrees 298(AgBr, g) = 27.8 +/- 0.3 kcal mol(-1) and DeltafH degrees 298(Ag3Br3, g) = -19.0 +/- 1 kcal mol(-1). The dissociation energy, D degrees 0(AgBr), is found to be 66.4 +/- 0.3 kcal mol(-1), or 2.88 +/- 0.01 eV, some 3.5-5 kcal mol(-1) lower than previous literature values. Approximate thermochemical stabilities of the dimer species Ag2Cl2 and Ag2Br2 have also been evaluated. |
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Authors:
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D L Hildenbrand; K H Lau |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The journal of physical chemistry. A Volume: 109 ISSN: 1089-5639 ISO Abbreviation: J Phys Chem A Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-12-07 Completed Date: 2006-02-08 Revised Date: 2007-03-27 |
Medline Journal Info:
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Nlm Unique ID: 9890903 Medline TA: J Phys Chem A Country: United States |
Other Details:
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Languages: eng Pagination: 11328-31 Citation Subset: - |
Affiliation:
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SRI International, Menlo Park, California 94025, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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