Essential Chemistry for IGCSE - Chemical Reactions (Section 3 - No. 48)
In the reaction: 2CO(g) + O₂(g) ⇌ 2CO₂(g) ΔH < 0, which of the following changes would shift the equilibrium to the right (favoring the formation of CO₂)?
Decreasing the temperature
Increasing the temperature
Decreasing the pressure
Adding an inert gas
Explanation
The reaction is exothermic (ΔH < 0), so decreasing the temperature favors the forward reaction, shifting the equilibrium to the right. Pressure change will have no effect because the number of moles is the same on both sides.
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