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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/61637

    Title: Kinetic Study on the Reaction of Yba2cu3oy Powder With Water
    Authors: Yu, F.C.;Lin, C.H.;Wang, C.M.;Kao, H.-C.I.
    Contributors: 淡江大學化學學系
    Keywords: YBa2Cu3Oy;superconductors;kinetics;activation energy
    Date: 2003-08
    Issue Date: 2011-10-15 23:24:03 (UTC+8)
    Publisher: Singapore: World Scientific Publishing Co. Pte. Ltd.
    Abstract: The reaction of superconducting YBa2Cu3Oy powder with water is studied inetically. The initial rate law is found as Ro = k[S]ao [H3O+]bo where [S]o is the initial surface area of the solid, a and b is found to be 0.94 ± 0.02 and 0.318 ± 0.002, respectively. For 100.7 mg powder with a mean radius of 0.0265 mm at pH 7.00 and 298 K, Ro is 2.21 X 10-4 mol.min-1. Using a = 1 and b = 0.3, the rate constant, k, obtained at 283, 298 and 313 K is 0.64, 1.84 and 4.91 X 10-3 mol.min-1.cm-2.M-0.3, respectively. The activation energy is 50.0 Kj.mol-1 and pre-exponential factor is 1.09 X 106 mol.min-1.cm-2.M-0.3, as calculated from the Arrhenius equation.
    Relation: International Journal of Modern Physics B 17(18-20), pp.3629-3635
    DOI: 10.1142/S0217979203021526
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article
    [Graduate Institute & Department of Chemistry] Journal Article

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