What is meant by dynamic equilibrium?
Explain with suiitable examples.

Explanation

In a reversible process, a state will be attained such that the rate of forward reaction is equal to the backward rate of reaction.
Such a state is known as equilibrium state.
At equilibrium we find no change in the concentration of either reactants (or) products then we may feel that the reaction has stopped. But actually the reaction will be going on. Such a state of reaction is called dynamic equilibrium.
Equilibrium processes are of two types.
They are:
1. Physical equilibrium process: In such a process, equilibrium occurs in a phase transformation process.
Ex: Solid `hArr` liquid
Solid `hArr` vapour
Vapour `hArr` liquid
2. Chemical equilibrium process: If there exists an equilibrium in between reactants and products, such reactions are said to be chemical equilibrium process.
1. `N_(2)+3H_(2)hArr2NH_(3)`
2. `2SO_(2)+O_(2)hArr2SO_(3)`
the forward and backward reactions of a reversible reaction continuously takes place with equal rates simultaneously at the equilibrium stage also. Hence the equilibrium is called dynamic equilibrium. At this state the reaction appears to be stopped.
All chemical equilibrium processes are dynamic equilibriums in nature.