Point to remember Characteristics of Equilibrium State..... | JEE NEET CORNER

Point to remember

Characteristics of Equilibrium State.....

It can be attained only if the reversible reaction is carried out in closed vessel.

It can be attained from either side of the reaction.

A catalyst can hasten the approach of equilibrium but does not alter the state of equilibrium.

It is dynamic in nature i.e. reaction does not stop but both forward and backward reactions take place at equal rate.

Change of pressure, concentration or temperature favours one of the reactions (forward or backward) resulting in shift of equilibrium point in one direction.

Law of Mass Action & Equilibrium Constant

“The rate at which a substance reacts is directly proportional to its active mass and rate of a chemical reaction is directly proportional to product of active masses of reactants each raised to a power equal to corresponding stoichiometric coefficient appearing in the balanced chemical equation”.

For reaction aA + bB \rightleftharpoons cC + dD

Rate of reaction ∝ Aa.Bb

or rate of reaction = KAaBb

where K is rate constant or velocity constant of the reaction at that temperature.

Unit of rate constant (K)
K = \frac{Rate\ of\ reaction}{A^aB^b}=\frac{molL^-^1 s^-^1}{(molL^1^)^a^+^b } = (molL^-^1)^1\ ^t^o\ ^n\ s^-^1