Revision: Class 12 >> Chemical Kinetics NEET (UG) Chemical Kinetics

Zero order reaction is the reaction whose rate is independent of the reactant concentration and remains constant throughout the course of the reaction.

The reactions that have higher order true rate law but are found to behave as first order are called pseudo first order reactions.

\[\ce{CH3COOCH3 + H2O - CH3COOH + CH3OH}\]

The molecularity of an elementary reaction refers to how many reactant molecules are involved in reactions.

The molecularity of a chemical reaction is the number of molecules or ions involved in an elementary process. The integer value represents the number of entities involved in a reaction.

The time in which concentration of reactant becomes half of its initial concentration is called half Life. It is denoted by `t_(1/2)`.

A chemical reaction in which the rate of reaction depends solely linearly on the concentration of one ingredient is referred to as a first-order reaction.

A first-order reaction is a reaction whose rate depends upon the first power of the concentration of reactants, i.e., the rate is directly proportional to the concentration of reactants.

Half life of a reaction is defined as the time required for the reactant concentration to reach one half of its initial value.

Activation energy is the lowest energy necessary to commence a chemical reaction by disrupting the bonds of reactant molecules and creating the activated complex or transition state. It signifies the energy threshold that must be surmounted for a reaction to transpire. Activation energy is typically represented as E_a.

Activation energy may be defined as the excess energy that the reactant molecules (having energy less than the threshold energy) must acquire in order to cross the energy barrier and to change into the products.