TERMIUM Plus®

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RATE LAW [3 records]

Record 1 2005-04-08

English

Subject field(s)
  • Chemistry
DEF

An expression that gives the rate of a reaction as a function of concentrations; often called the rate law.

CONT

The differential rate law describes how the rate of reaction varies with the concentrations of various species, usually reactants, in the system. The rate of reaction is proportional to the rates of change in concentrations of the reactants and products; that is, the rate is proportional to a derivative of a concentration.

OBS

There are two forms of a rate law for chemical kinetics: the differential rate law and the integrated rate law.

Key term(s)
  • rate law

French

Domaine(s)
  • Chimie
CONT

Équation de vitesse intégrée. Jusqu'à présent les équations de vitesse utilisées ne permettaient d'exprimer que la variation de vitesse en fonction de la concentration des réactifs. Il est aussi utile d'exprimer la variation de concentration des réactifs en fonction du temps, une fois que l'on connaît l'équation de vitesse différentielle.

CONT

Lois de vitesse : formes différentielle et intégrale.

Spanish

Save record 1

Record 2 2004-07-12

English

Subject field(s)
  • Chemistry
DEF

... a mathematical equation that describes the progress of the reaction.

CONT

A rate law is an algebraic expression giving the flux through a process in terms of the molecular abundances or concentrations of the molecules involved and perhaps including a number of other physical forces. Perhaps the most famous rate law in biology is the Henri-Michaelis-Menten rate law ... Ohm's law is a more widely encountered example ... Other famous linear rate laws are bulk flow, and diffusion. These and many others can be seen as special cases of the general principle that fluxes are driven by gradients in chemical potential. The simplest rate law of all is the linear, first order rate law kS which embodies the physical-chemical principle of mass action. Here k is the rate constant, and S is the concentration of the molecule that is moved or transformed by this process.

OBS

There are two forms of a rate law for chemical kinetics: the differential rate law and the integrated rate law.

French

Domaine(s)
  • Chimie
CONT

Loi de vitesse. La vitesse d'une réaction chimique dépend généralement de plusieurs variables, dont les plus importantes sont la concentration des différentes espèces chimiques (réactifs et produits) et le temps.

CONT

Loi ou équation de vitesse exprime la variation de la vitesse en fonction des concentrations des réactifs (ainsi que des produits, catalyseurs, etc).

CONT

Lois de vitesse : formes différentielle et intégrale.

Spanish

Save record 2

Record 3 1998-02-11

English

Subject field(s)
  • Chemistry
DEF

An expression for the rate of reaction of a particular reaction in terms of concentrations of chemical species and constant parameters (normally rate coefficients and partial orders of reaction) only.

French

Domaine(s)
  • Chimie
DEF

Expression de la vitesse de réaction d'une réaction donnée en ne faisant intervenir que des concentrations d'espèces chimiques et des paramètres constants (normalement des coefficients de vitesse et des ordres partiels de réaction).

Spanish

Save record 3

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