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Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097

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BuyFindarrow_forward

Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097
Textbook Problem

Define what is meant by unimolecular and bimolecular steps. Why are termolecular steps infrequently seen in chemical reactions?

Interpretation Introduction

Interpretation: The terms unimolecular and bimolecular steps are to be defined. An explanation regarding the termolecular steps being less frequent in chemical reactions is to be stated.

Concept introduction: The number of atoms, ions or molecules that need to undergo a collision with each other simultaneously for a chemical reaction to take place is termed as the molecularity of the reaction. A reaction requiring the collision of three particles at the same instant is known as a termolecular reaction.

Explanation

Unimolecular Steps

The steps involving only one reactant are termed as unimolecular steps.

When the rearrangement of a single molecule leads to the formation of one or more products in a chemical reaction it is termed as a unimolecular reaction. The decomposition of NH4NO2 is an example of a unimolecular reaction. The reaction is,

NH4NO2N2+2H2O

Bimolecular Steps

The steps involving two reactants are termed as unimolecular steps.

When the formation of product takes place from the collision between two reactant species, the reaction is termed as a bimolecular reaction

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