What are the two things that can cause a disturbance (a. k.a change) in the chemical world equilibrium of a chemical reaction

concentation changes, temperature changes & Pressure-volume changes

Explanation:

Actually there are 3 principles that can disturb an equilibrium...

1. changes in concentration of reaction components

2. changes in temperature conditions, and

3. changes in pressure-volume conditions.

Such changes are summarized in LeChatelier's Principle ...

If a stress (disturbance) is applied to a stable equilibrium, the equilibrium will shift away from the applied stress and establish a new equilibrium with new component concentration values.

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