first-order reaction


Also found in: Medical.

first-order reaction

[¦fərst ‚ȯrd·ər rē′ak·shən]
(physical chemistry)
A chemical reaction in which the rate of decrease of concentration of component A with time is proportional to the concentration of A.
References in periodicals archive ?
Thus, the reaction can be seen as a first-order reaction [4, 6, 20], Since the p-nitrophenol concentration of feed solution is proportional to the intensity of absorption peak at 400 nm, the rate constant [k.
It is assumed that oil shale pyrolysis is a first-order reaction, so the kinetic equation of oil shale pyrolysis can be described by the following equation:
Table 1: kinetics models used for describing the data trend in desorption study Model equation First-order reaction ln[q.
This overestimation of k is evidenced when observing Figure 3, in which the line that describes the first-order reaction is below the data obtained and the lined fitted from the other evaluated models, particularly in the samples taken closer to the exit from filters (HRT = 0.
For species transport model, ozone deposition was simulated by the first-order reaction of ozone with surfaces of leakage paths.
A first-order reaction will yield a straight line when the data are plotted, as illustrated in figure 1 (ref.
How long will it take for 50 percent of a substrate to disappear in a first-order reaction if it has a reaction rate constant of 0.
In our calculations we assumed, that the coal and aditives oxidation is the first-order reaction and that the effect of diffusion can be neglected under used experimental conditions.
Results showed that a good correlation exists between enrichment and first-order reaction rate constants with an [R.
The fitting of experimental data to first-order reaction models will indicate the changing of desorption rate constants with respect to the different reaction periods.
The decline in long-term (seven-day) chlorine residual could be modeled as a first-order reaction.
As for the [NaBH4] largely excess the [p-NA] and is considered to be approximately constant during the course of thereaction, the pseudo-first-order reaction rate constant (k') equals first-order reaction rate constant (k) multiply [NaBH4].

Full browser ?