{"term":{"id":"03396","doi":"10.1351\/goldbook.K03396","code":"K03396","status":"current","longtitle":"IUPAC Gold Book - kinetic activity factor","title":"kinetic activity factor","version":"2.3.3","lastupdated":"2014-02-24","definitions":[{"id":"1","text":"A factor involving activity coefficients that appears as a multiplier in the rate equation. For a bimolecular reaction the factor is y A y B y ‡,y B and y ‡ are the activity coefficients for the reactants A and B and the activated complex, respectively. For a unimolecular reaction the factor is , and for a trimolecular reaction it is .","links":[{"title":"bimolecular","type":"goldify","url":"https:\/\/goldbook.iupac.org\/terms\/view\/M03989"},{"title":"activated complex","type":"goldify","url":"https:\/\/goldbook.iupac.org\/terms\/view\/A00092"}],"math":[{"alttext":"y A y B y ‡","latex":"\\frac{y_{\\text{A}}\\ y_{\\text{B}}}{y_{\\ddagger}}"},{"alttext":"y A","latex":"y_{\\text{A}}"},{"alttext":"y B","latex":"y_{\\text{B}}"},{"alttext":"y ‡","latex":"y_{\\ddagger }"},{"alttext":"y A y ‡","latex":"\\frac{y_{\\text{A}}}{y_{\\ddagger}}"},{"alttext":"y A y B y C y ‡","latex":"\\frac{y_{\\text{A}}\\ y_{\\text{B}}\\ y_{\\text{C}}}{y_{\\ddagger}}"}],"sources":["PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 171 (https:\/\/doi.org\/10.1351\/pac199668010149)"]}],"links":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/K03396\/html","json":"https:\/\/goldbook.iupac.org\/terms\/view\/K03396\/json","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/K03396\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/K03396\/plain","pdf":"https:\/\/goldbook.iupac.org\/terms\/view\/K03396\/pdf"},"citeas":"IUPAC. Compendium of Chemical Terminology, 2nd ed. (the \"Gold Book\"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https:\/\/doi.org\/10.1351\/goldbook.","license":"Licensed under Creative Commons Attribution-NoDerivatives (CC BY-NC-ND) 4.0 International (https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/)","collection_reuse":"For parties interested in reusing the entire IUPAC Gold Book please contact IUPAC here https:\/\/www.cognitoforms.com\/IUPAC1\/ContactInformationForm","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2023-09-22T01:16:55+00:00"}}