Gaois

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  1. INDUSTRY|chemistry

    #626067

    IATE #1350268
    fuinneamh gníomhachtúcháin Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    Aktivierungsenergie
    de
    activation energy | Arrhenius activation energy
    en
    Definition empirical parameter characterizing the exponential temperature dependence of the rate coefficient, kEa = R T2[d(lnk)/dT]where R is the gas constant and T the thermodynamic temperature. Reference "IUPAC. Compendium of Chemical Terminology, 2nd ed. (the ""Gold Book""). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8 http://goldbook.iupac.org/A00102.html [2.7.2010]"
    Comment The term is also used for threshold energies in electronic potential surfaces, in which case the term requires careful definition
    énergie d'activation
    fr
    Definition grandeur définie par la loi d'Arrhénius et qui intervient dans l'expression des vitesses de réaction. Fondée sur des considérations thermodynamiques, la loi d'Arrhénius exprime la variation de la constante de vitesse des réactions chimiques en fonction de leur énergie d'activation et de la température Reference Schayes,G.et Ronneau,C.,Université catholique de Louvain,Louvain-la-Neuve,1998