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Determination of rate constants by chemical relaxation method

✍ Scribed by W. Richard; Arbesman; Kim G. Young

Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
593 KB
Volume
24
Category
Article
ISSN
0009-2509

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✦ Synopsis

Two methods are presented for obtaining rate constant of two-step reactions A, Ft A, Ft As by means of chemical relaxation technique when two relaxation times ate of the same order of magnitude. Both methods employ nonlinear estimation. The first method involves obtaining the relaxation times directly from the transient response data whereas the second method involves obtaining zeroes and poles of the transfer function which, in turn, is obtained from numerical Fourier transformation of pulse response data The two methods are compared by using the results obtained from computergenerated 'experimental' data.

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## Abstract Tungsten hexacarbonyl was studied by chemical ionization mass spectrometry using carbon monoxide as reagent gas. The variation of the relative abundances of ions as a function of reactant gas pressure was used for evaluating the relative rate constants for consecutive reactions. The res