Le Chatelier's principle states that a system at equilibrium under stress:

1. Le Chatelier: when an external stress (change in T, P, concentration) is applied to a system at equilibrium, the system shifts to OPPOSE and minimise the stress. 2. The system reaches a new equilibrium state. 3. It does NOT stay at the old equilibrium — that's the whole point. _Source: NCERT Class 11 Chem Ch 7 §7.6 Le Chatelier's Principle_