Order of reaction can never be fractional for an elementary reaction
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An elementary reaction is a reaction that takes place in one step.
The molecularity which is also equal to kinetic order can be defined as:
-The minimum number of molecules, atoms or ions of the reactants required for the reaction to occur and it is equal to the stoichiometric coefficients of the reactants in the chemical equation of the reaction.
KEY POINTS ABOUT MOLECULARITY
1.) It is a theoretical concept.
2.) It can never be zero, negative, fractional, infinite and imaginary.
3.) It cannot be greater than 3 coz more than three molecules may not mutually collide with each other.
The molecularity which is also equal to kinetic order can be defined as:
-The minimum number of molecules, atoms or ions of the reactants required for the reaction to occur and it is equal to the stoichiometric coefficients of the reactants in the chemical equation of the reaction.
KEY POINTS ABOUT MOLECULARITY
1.) It is a theoretical concept.
2.) It can never be zero, negative, fractional, infinite and imaginary.
3.) It cannot be greater than 3 coz more than three molecules may not mutually collide with each other.
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1
A closely related concept to reaction order is the theoretical "molecularity". It refers to the number of directly colliding species in an elementary reaction step. A termolecular process would involve three chemical species colliding similtaneously, which is a low-probability event. Order of a reaction cannot be greater than 3. It can never be a fraction.
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