Use the following reaction to answer the questions below: ___ CO(g) + ___ O2(g) ⇄ ___ CO2(g) ∆H = + 100.21 kJ Determine the shift when: Temperature decreases 3. Decrease in O2 Decrease in pressure 4. Decrease in CO2

Chemical equilibria can be shifted by changing the conditions that the system experiences. We say that we “stress” the equilibrium. When we stress the equilibrium, the chemical reaction is no longer at equilibrium, and the reaction starts to move back toward equilibrium in such a way as to decrease the stress. The formal statement is called Le Chatelier’s principle: If an equilibrium is stressed, then the reaction shifts to reduce the stress.

Explanation:

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