first-order reaction

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first-·or·der re·ac·tion

a reaction in which the rate is proportional to the concentration of the single substance undergoing change; radioactive decay is a first-order process, defined by the equation dN/dt = kN, where N is the number of atoms subject to decay (reaction), t is time, and k is the first-order decay (reaction) constant, that is, the fraction of all atoms decaying per unit of time.
See also: decay constant, order.

first-order reaction

a reaction in which the rate of reaction is directly proportional to the concentration of one of the reactants, either product or substrate.
References in periodicals archive ?
0]) shows a linear relation to the reaction time for three composite membranes, indicating that the reaction is in accordance with first-order reaction kinetics.
2]) vs 1/Tm depicted in Figure 6 shows that the reaction of oil shale pyrolysis can be described by a first-order reaction model in the studied temperature range.
This makes it possible to apply the first-order reaction rate model used in peroxide crosslinking simulations to rubber curing.
For a first-order reaction, the mean residence time is
Kinetic data for charcoal can only be fitted to a single first-order reaction, and all sorbed Ag can be desorbed at t = [infinity].
The results of non-isothermal experiments showed that oil formation process can be quite accurately represented as a first-order reaction.
1]) has been estimated from first-order reaction kinetics using the slope of straight line, indicating a high catalytic reduction rate which can also be comparable to some research results [23, 28].
Fortunately, the decomposition of many substances can be predicted by relatively simple zero-and first-order reaction rates which were introduced in Chapter 12.
This is a first-order reaction, which is very predictable for any specific peroxide.
Turkish oil shale was studied by TGA at non-isothermal conditions under argon and first-order reaction kinetics was found to fit kinetic data [10].

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