Question

what is the collision theory

Answer 1

HERW IS YOUR ANSWER.....


COLLISION THEORY IS A THEORY PROPOSED INDEPENDENTLY BY MAX TRAUZ IN 1916 AND BY WILLIAM LEWIS IN 1918, THAT QUALITATIVALEY EXPLAINS HOW CHEMICAL REACTIONS OCCUR AND WHY REACTIONS RATES DIFFER FROM DIFFERENT REACTIONS.....








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Answer 2

Hey !!

Molecular collision theory of reaction rates was developed by ''Trautz and Lewis''.

It is based on kinetic theory of gase. It provides a better insight into the energetic and mechanistic aspects of chemical reaction. According to simpler molecular collision theory, the reactant molecules are assumed to be hard spheres. The reaction is postulated to occur when molecules collide with each other.

1. The reactants molecules must collide together, if they are to react with each other.
2. The number of collisions per sec per unit volume of the reaction mixture is generally high and is known as collision frequency.
3. All collisions do not lead to chemical reactions. Only those collisions give rise to chemical reaction in which the molecules acquires energy level greater than or equal to threshold frequency.

Energy of colliding molecular is more than that of product molecules in an exothermic reaction.

Energy of colliding molecules is less than that of product molecules in an endothermic reaction.

The change in enthalpy is -ve in an exothermic reaction and is +ve in an endothermic reaction.

• Collision possessing a minimum of threshold frequency are called  effective collision.

              ⊕     VERY IMPORTANT FORMULA                                  

ACTIVATION ENERGY = THRESHOLD ENERGY - ENERGY OF COLLIDING MOLECULES.