Condition For Order And Molecularity Are Equal

For order and molecularity of a reaction to become equal, the reaction must be elementary reactions. For example, consider the below reaction:

A + B → Products

Rate equation = [A]1 [B]1

The order of reaction is the sum of the coefficient of rate equation.

Therefore, the order of reaction = 2

And molecularity = 2

Few things to know about the elementary reaction:

  • The elementary reaction is the sum of the overall reaction equation.
  • For elementary reactions, molecularity is derived at every step.

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