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← ScienceWhich outcome reduces gaseous product yield at equilibrium?
A)Lowering reaction temperature exothermically shifts equilibrium✓
B)Increasing initial reactant concentration always helps
C)Increasing reaction catalyst effectiveness remains
D)Decreasing system pressure favours product yield
💡 Explanation
Decreasing temperature for an exothermic reaction increases the equilibrium constant because lower energy states are favored. Therefore, lowering the temperature shifts equilibirum to favour reactants over products, and reduce product yields, rather than promoting product formation by other means.
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