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Equilibrium displacement

Principle

General law of Le Châtelier and Van't Hoff

If a chemical system at equilibrium experiences a change in concentration, temperature, volume, or pressure, then the equilibrium shifts to counteract the imposed change and a new equilibrium is established.

In short..

T increased (decreased)   →   endothermic reaction (exothermic) favoured! Concentration of a species increased (decreased)   →   the reaction which makes disappear (appear) this species is favoured! P increased (decreased)   →  reaction which decreases (increases) the volume is favoured!

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