Arrhenius equation

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Arrhenius equation

[ar′rā·nē·əs i′kwā·zhən]
(physical chemistry)
The relationship that the specific reaction rate constant k equals the frequency factor constant s times exp (-Δ Hact/ RT), where Δ Hactis the heat of activation, R the gas constant, and T the absolute temperature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
We know that reducing operating temperature by 10[degrees]C can double the lifetime of components like ICs and LEDs--the so-called Arrhenius law. Carmakers need to "life" key components and subsystems (not only the electronics but major mechanical elements as well) to uphold their reputation and minimize warranty claims.
It can be known that the temperature dependence of electrical conductivity can be expressed by the Arrhenius law as:
Within these intervals, the temperature dependencies of [DELTA][V.sub.FB] obeyed Arrhenius law with the activation energy [E.sub.a] [approximately equal to] 0.5 eV (Figure 3, curves (1) and (2)).
The slopes of the linear fits [lines in Figure 5(b)] are representing the activation energy in an Arrhenius law. For PLA "as-printed" and PLA/IL 10 wt% we assume approximately the same value, but for PLA/IL 5 wt% it is increased.
monomer concentration, pH value, salt concentration, and temperature, whereby it is describe by Arrhenius law.
The regression values of all samples are close to unity where R2 [approximately equal to] 1, indicating that the temperature-dependent ionic conducting for this CMC-NH4SCN SBE system obeys Arrhenius law, suggesting that conductivity is thermally assisted [15].
The modified Arrhenius law (IUPAC Goldbook definition of modified Arrhenius equation) is usually of the form (Tencer et al.
According to Neel [28] magnetic moment of noninteracting single domain particles with uniaxial magnetic anisotropy relaxes via an activated process, [tau] = [[tau].sub.0] exp(E/[k.sub.B]T), that is, the Arrhenius law, where E is the barrier due to anisotropy energy required for reversal of magnetic moment orientation and [tau] is the relaxation time.
Nonlinearity can be found in reaction rates ([k.sub.j]) which are described via Arrhenius law and reaction heat hr: