What is the rate law for a unimolecular reaction?
Table 14.6.1 Common Types of Elementary Reactions and Their Rate Laws
| Elementary Reaction | Molecularity | Rate Law |
|---|---|---|
| A → products | unimolecular | rate = k[A] |
| 2A → products | bimolecular | rate = k[A]2 |
| A + B → products | bimolecular | rate = k[A][B] |
| 2A + B → products | termolecular | rate = k[A]2[B] |
What is meant by rate constant of a reaction?
reaction rate The rate constant, or the specific rate constant, is the proportionality constant in the equation that expresses the relationship between the rate of a chemical reaction and the concentrations of the reacting substances.
What does a unimolecular reaction mean?
unimolecular reaction: an elementary reaction in which the rearrangement of a single molecule produces one or more molecules of product.
What is unimolecular reaction in chemical kinetics?
Unimolecular reactions are those involving a change in only one molecular of ionic structure. Dissociation or isomerization of the molecule may be considered as characteristic examples of such reactions.
What is meant by unimolecular?
Definition of unimolecular : relating to or involving a single molecule or single molecular species : monomolecular unimolecular reactions.
What is unimolecular reaction with example?
A unimolecular reaction occurs when a molecule rearranges itself to produce one or more products. An example of this is radioactive decay, in which particles are emitted from an atom. Other examples include cis-trans isomerization, thermal decomposition, ring opening, and racemization.
Why do catalyst change the rate of reaction?
A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction. Energy diagrams are useful to illustrate the effect of a catalyst on reaction rates.
How does rate constant affect reaction rate?
The rate constant (k) of a rate law is a constant of proportionality between the reaction rate and the reactant concentration. The exponent to which a concentration is raised in a rate law indicates the reaction order, the degree to which the reaction rate depends on the concentration of a particular reactant.
What is difference between rate constant and specific rate constant?
A rate law is an expression showing the relationship of the reaction rate to the concentrations of each reactant. The specific rate constant (k) is the proportionality constant relating the rate of the reaction to the concentrations of reactants.