Chemistry

Difference between Molecularity and order of a Reaction

The Major difference between molecularity and order of a reaction is that Molecularity is the number of atoms, ions, or molecules that must collide with one another simultaneously and result in a chemical reaction while the order of a reaction is the sum of the concentrations on which the rate of reaction actually depends.

difference between molecularity and order of a reaction

Order of Reaction

  1. It is the sum of all the exponents of the concentration of reactants involved in the rate equation.
  2. Its value can be in whole number or fraction.
  3. Its value can never be more than three.
  4. It can be zero.

Molecularity of Reaction

  1. It is the total number of atoms, molecules, or ions present in a single step.
  2. Its value is always in the whole number.
  3. Its value can be more than three.
  4. It can never be zero.

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