Question

Difference between molecularity and order of reaction with examples

Answer 1

ORDER of a reaction: it can be determined only by experiments.                it is the sum of power of the reactants.
Molecularity: Not necessary that it should be determined only by experiments.                      it is the total no.of molecules reacting in a reaction

Answer 2

ORDER AND MOLECULARITY

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ORDER

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=> the sum of the powers of the concentration terms in rate law expression

=> it is determined experimentally

=> it can be a whole number, zero or even fraction

=> provides some ideas about. Reaction mechanism

MOLECULARITY

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=> it is the number of reacting species undergoing simultaneous collision in the reaction

=> it is a theoretical concept

=> it always a whole number

=> does not tell us the reaction mechanism