Reaction rate constant Totally Explained

Everything about Reaction Rate Constant totally explained

In chemical kinetics a reaction rate constant k or

lambda

quantifies the speed of a chemical reaction. For a chemical reaction where substance A and B are reacting to produce C, the reaction rate has the form:
ť

frac[A]^m[B]^n

E_a is the activation energy and R is the Gas constant. Since at temperature T the molecules have energies according to a Boltzmann distribution, one can expect the proportion of collisions with energy greater than E_a to vary with e^-Ea/RT. A is the pre-exponential factor or frequency factor.
The Arrhenius equation gives the quantitative basis of the relationship between the activation energy and the reaction rate at which a reaction proceeds.
The units of the rate coefficient depend on the global order of reaction:

For order zero, the rate coefficient has units of mol L^-1 s^-1 or mol dm^-3 s^-1
For order one, the rate coefficient has units of s^-1
For order two, the rate coefficient has units of L mol^-1 s^-1 or mol^-1 dm³ s^-1
For order n, the rate coefficient has units of mol^1-n L^n-1 s^-1 or mol^1-n dm^3n-3 s^-1

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