rate constant


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rate constant

[′rāt ‚kän·stənt]
(physical chemistry)
Numerical constant in a rate-of-reaction equation; for example, rA = kC aA C bB C cC, where CA ,CB , and CC are reactant concentrations, k is the rate constant (specific reaction rate constant), and a, b, and c are empirical constants.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
As shown in Table-2, the rate constant (kr1 and kr2) of pseudo-first order and pseudo-second order models are proportional to the amount of cross-linker used indicating the increase in swelling rate with increase in amount of cross-linker.
Macdonald, "Determination of the rate constant and product channels for the radical-radical reaction NCO + [C.sub.2][H.sub.5]," Physical Chemistry Chemical Physics, vol.
Effect of the concentration of ferrous ion on the Rate constant of the reaction
This model serves as a platform for the development and testing of ab initio/DFT methods and rate constant rules for the combustion chemistry of oxygenated fuels.
The absorption rate constant (ka) for atorvastatin was 0.41 0.33 l/hr.
where [B.sub.t] is the binding at time t, [B.sub.eq] is the binding at equilibrium, and [k.sub.obs] represents the observed rate constant describing the rate of binding [4].
The rate constant for the diffusion process, kd, is proportional to the drug release rate during the burst release stage.
Rate constants k ([min.sup.-1]) for each of the frying temperatures and activation energies [E.sub.a] (KJ/mol) for each of the frying treatments were determined.
In existing mathematical models in Table 1, X is the biomass concentration, [mu] the microbial specific growth rate constant, [gamma] stationary constant, [k.sub.d] death or biomass degradation constant, and [X.sub.m] the maximum biomass concentration.
The reactions of phosphate bis-ester were strappingly catalysed at different concentrations of CTABr at which pseudo first order rate constants were obtained.
Where, k is the reaction rate constant, R is the gas constant, T is temperature, A is Arrhenius constant and E or [E.sub.A] is activation energy.