frequency factor

frequency factor

[′frē·kwən·sē ‚fak·tər]
(physical chemistry)
The constant A (or ν) in the Arrhenius equation, which is the relation between reaction rate and absolute temperature T ; the equation is k = Ae- (Δ Hact/ RT), where k is the specific rate constant, Δ Hactis the heat of activation, and R is the gas constant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In the first linear zone, the apparent activation energy and frequency factor were found to be in the range of 63.1-94.2 kJ/mol and 9.3E+3-5.03E+6, respectively.
The frequency factor (A) and activation energy ([E.sub.a]) were obtained using Arrhenius and Kissinger methods.
where [D.sub.0] is the temperature independent frequency factor, [k.sub.B] is the Boltzmann constant, and T is the temperature.
The activation energy [E.sub.A] of this relaxation is 1.32 [+ or -] 0.08 eV/atom (but may change with composition), and the frequency factor [k.sub.0] is [10.sup.15.6[+ or -]1] [s.sup.-1].
The frequency factor ([k.sub.i]), activation energy ([Ea.sub.i]) along with the [NH.sub.3] storage capacity ([OHM]) of the catalyst were determined based on the experimental method of Shost et al.
P3 is designed in consideration of the temporal frequency factor based on P1.
On the other hand, it was observed that the values for the frequency factor in the Arrhenius equation are different.
In [9] manage the interference based on fractional frequency reuse scheme; here the frequency factor is reused in HetNet in LTE advanced.
Before proceeding to tackle the actual clustering phenomena to formulate the frequency factor [omega], we will very briefly sketch the procedure and final result that have been successfully developed to fulfill objective (A) of the work, whereby the full, more accurate, four-level process scheme of Fig.
Key Words: Probable Maximum Precipitation, Hershfield method, Gumble method, Log Pearson Type- III method, Frequency factor

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