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Tungsten bond dissociation energies

He concludes that the first (associative) mechanism gives values nearest the observed heat of adsorption determined by Beeck (30), and is therefore accepted as nearest the truth (34) (Qo (calculated) = 42 kcal./ mole Qo (observed) = 58 kcal./mole). Experiments on tungsten and nickel films (Beeck (35), Trapnell (36), and more recent work in Rideal s laboratory) have shown that when ethylene is added to a clean metal surface ethane appears in the gas phase. A self hydrogenation mechanism must be operative and at least in these cases dissociation of ethylene must occur on the catalyst. It is suggested that the calculations might be complicated by the energy of bond strain in the adsorption of an ethylene molecule to the fixed lattice distances of the metal. [Pg.18]


See other pages where Tungsten bond dissociation energies is mentioned: [Pg.49]    [Pg.568]    [Pg.624]    [Pg.1572]    [Pg.199]    [Pg.40]    [Pg.289]    [Pg.74]    [Pg.211]    [Pg.282]    [Pg.68]    [Pg.8]    [Pg.98]    [Pg.258]    [Pg.32]    [Pg.116]    [Pg.35]    [Pg.162]    [Pg.143]    [Pg.58]    [Pg.176]    [Pg.86]    [Pg.290]    [Pg.172]    [Pg.71]    [Pg.214]    [Pg.215]    [Pg.159]    [Pg.319]    [Pg.35]    [Pg.73]    [Pg.161]    [Pg.130]   
See also in sourсe #XX -- [ Pg.4 , Pg.52 ]




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