Question

What do you understand by order of reaction give on example cach of first and second order reactions how does order of a reaction different from moleculerity,?

Answer 1

Explanation:

Order of a chemical reaction can be defined as the sum of power of concentration of reactants in the rate law expression is called the order of that chemical reaction. Reactions can be first order reaction, second order reaction, pseudo first order reaction etc. depends on the concentration of the reactants. Order of a reaction is an experimental value. It means it is an experimentally determined parameter. It can have fractional value as well.

If experimental rate law expression is given for a reaction, then we can deduce the order of that reaction as well. For example, consider a reaction –

aA + bB P

and rate law is given as –

rate = kAxBy

order of reaction for the above reaction on the basis of given rate law can be written as follows –

order of reaction = x + y