Which condition alters equilibrium composition in reversible exothermic gas-phase reaction in a closed system?

💡 Explanation

When system temperature increases, thermal energy upsets the equilibrium as the reverse endothermic reaction is favoured to counteract the temperature change, this shifts equilibrium composition via Le Chatelier's principal. Therefore only increasing the temperature alters the product to reactant ratio, rather than adding an inert gas/catalyst, or slightly reducing pressure which influence reaction rate.

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