Chapter 17, Problem 3A

Interpretation Introduction

Interpretation: The visionary reactions need to be explained in the terms of collision model of reactions. The reaction mechanism needs to be explained using a sample reaction.

Concept Introduction:The collision model for reaction states that two or more reactants can react only when they fulfil certain conditions.

Answer to Problem 3A

Chemists envision the reactions taking place in such a way where two or more reactant molecules collide with enough activation energy and correct orientation so that bonds break and reform to form the products.

Explanation of Solution

For explaining the collision model we take the example addition reaction $A+B\to D$ ;

In the above reaction, molecules of A and B will collide randomly inside the medium but only when they do collide with high enough activation energy with a particular collision angle to each other, their bonds will break and reform to form the addition product D. This is how an individual would envision the reaction.