Le Châtelett principle understanding

Description: If one of the conditions that affect balance is changed, the balance moves in a direction that can weaken that change.

Scope of application: a balanced system.

Direction of Movement: Moves in a direction that attenuates this change.

Moving result: weakening this change, not eliminating it, much less reversing it.

Example: In the equilibrium of nitrogen hydrogen synthesis of ammonia, positive reaction exothermic.

(1) Increase the nitrogen concentration, this change is an increase in nitrogen concentration, weaken the direction of movement of this change is the balance of positive movement, the positive nitrogen concentration in progress has decreased, but the result of the movement of nitrogen concentration is greater than the original equilibrium,

Decrease the ammonia concentration, weaken the direction of movement of this change is a positive movement, the ammonia concentration increases during the movement, but the result is that the ammonia concentration is smaller than the original equilibrium.

(2) Increase the temperature, this change is heating, weakening the direction of this change is the direction of the endothermic reaction (reverse) movement, the reaction endothermic temperature in reverse progress has decreased, but the temperature of the moving result system is higher than the original equilibrium.

(3) Increase the pressure, this change is the pressure increase, weaken the direction of this change is positive movement, the pressure in the movement has decreased, but the result is greater than the original balance.