Classification of Chemical Equilibrium

In our daily life, we see many things which show incredible balance

Like balancing of stones

Or like weighing scale which is used to weigh fruits and vegetables.

This balancing condition is also known as Equilibrium

Equilibrium is normally of two types viz. Physical equilibrium and Chemical equilibrium

It is a state in which the rate of the forward reaction equals the rate of the backward reaction

In other words, there is no net change in concentrations of reactants and products

Chemical Equilibrium can be further classified on the basis of the state of reactants and products

These are Homogenous equilibrium and Heterogenous equilibrium

'Homogenous' means same and 'Heterogenous' means different

Let's first start with Homogenous equilibrium

In homogeneous equilibrium, the phase of all the reagents (reactants and products) are same

For example, in preparation of ammonia, the state of reactants and products are the same.

Or take an example of the preparation of .

So in Homogenous equilibrium the reactant and product have the same state

Now let's move on to Heterogenous equilibrium

In heterogeneous equilibrium, the phases of the reagents are different

For example, the given reaction is in heterogeneous equilibrium as reactant and products are in different states.

Revision

Chemical Equilibrium is a state at which the rate of the forward reaction equals the rate of the backward reaction

Chemical Equilibrium can be classified on the basis of phase or state

On the basis of the phase of the reagents, it can be classified as homogeneous equilibrium and heterogeneous equilibrium

In homogeneous equilibrium, the phase of all the reagents (reactants and products) is same

While in heterogeneous equilibrium, the phases of the reagents are different

The End