Consider the following reaction at equilibrium. If the temperature is decreased, which way will the system shift to return to equilibrium?N2O4(g) + heat ⇌ 2NO2(g)Equilibrium will shift towards the reactants.Equilibrium will shift towards the reactants, and then shift towards the products.Equilibrium will shift towards the products, and then shift towards the reactants.Equilibrium will shift towards the products.
Question
Consider the following reaction at equilibrium. If the temperature is decreased, which way will the system shift to return to equilibrium?N2O4(g) + heat ⇌ 2NO2(g)Equilibrium will shift towards the reactants.Equilibrium will shift towards the reactants, and then shift towards the products.Equilibrium will shift towards the products, and then shift towards the reactants.Equilibrium will shift towards the products.
Solution
The reaction given is an exothermic reaction, meaning it releases heat. According to Le Chatelier's Principle, if you decrease the temperature (remove heat), the reaction will shift in the direction that produces heat to compensate. In this case, that is the direction of the reactants. So, the equilibrium will shift towards the reactants, which is N2O4(g). Therefore, the correct answer is "Equilibrium will shift towards the reactants."
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