LE – CHETLIER’S PRINCIPLE

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LE – CHETLIER’S PRINCIPLE:

 

Introduction

This principle was presented by Le-Chetlier in which explained the behaviour of a reversible reaction. lf its equilibrium is distributed externally.

 

Statement

According to Le-Chetlier’s principle.

If the equilibrium of a reversible reaction is disturbed by a stress then the reaction begins to shift in either direction to regain its equilibrium state.

Explanation

 

CHANGE IN CONCENTRATION

If equilibrium of a reversible reaction is disturbed by increasing the concentration of reactant then reaction will move in forward direction to regain equilibrium and vice versa.

It equilibrium of a reversible reaction is disturbed by increasing the concentration of product then reaction will move reverse direction to regain equilibrium and vice versa.

 

CHANGE IN TEMPERATURE

It the equilibrium of a reversible reaction is disturbed by increasing in temperature then reaction will move in that direction which is endothermic in nature. If the equilibrium of a reversible reaction is disturbed by decreasing in temperature then reaction will move in that direction which is exothermic in nature.

CHANGE IN PRESSURE

If the equilibrium of a reversible reaction is disturbed by increasing in pressure then according to Le-Chetliers principle reaction will move in that direction where less number of moles are present.

If equilibrium of a reversible reaction is distributed by decreasing in pressure then according to Le-Chetlier’s principle reaction will move in that direction where greater number of moles are present.

 

EFFECT OF CATALYST

Catalyst can not affect the equilibrium of any reversible reaction but if it is added in start then it can only minimize the time required to achieve equilibrium.

 

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