Equilibrium

What is the dynamic nature of equilibrium in chemical reactions?

• Reactions only move in one direction.

• Reactions start and end definitively.

• Reactions continue indefinitely, balancing forward and reverse processes.

• Reactions stop once equilibrium is reached.

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What defines chemical equilibrium?

• The cessation of all reactions.

• Equal rates of forward and reverse reactions.

• The complete conversion of reactants to products.

• The absence of any molecular transformation.

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How can chemists manipulate equilibrium to optimize outcomes?

• By stopping the reaction once products are formed.

• By allowing the reaction to reach its natural balance.

• By adjusting conditions such as pressure and concentration.

• By adding more reactants without changing conditions.

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According to Le Chatelier’s Principle, what happens if the concentration of reactants is increased?

• The reaction shifts to produce more reactants.

• The reaction shifts to produce more products.

• The reaction rate decreases.

• The reaction stops completely.

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What is the role of temperature in chemical equilibrium?

• Temperature always favors the forward reaction.

• Temperature only affects the rate of reaction, not equilibrium.

• Temperature changes can favor either the forward or reverse reaction.

• Temperature has no effect on equilibrium.

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What is an example of a visual demonstration that enhances understanding of equilibrium?

• Cobalt ions changing color with shifts in equilibrium conditions.

• The taste of a chemical solution.

• The sound of a reaction occurring.

• The smell of a chemical reaction.

How does the Haber process illustrate the manipulation of equilibrium?

• By adding more nitrogen and hydrogen without changing conditions.

• By allowing ammonia to decompose back into nitrogen and hydrogen.

• By decreasing pressure to slow down the reaction.

• By removing ammonia as it forms and increasing pressure.

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What is the ethical complexity associated with Fritz Haber's scientific advances?

• His ammonia synthesis saved lives but also facilitated explosives for wars.

• His work had no impact on warfare.

• His work was purely theoretical with no real-world applications.

• His work only had positive impacts on agriculture.

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What happens to an endothermic reaction when heat is added?

• The reaction stops completely.

• The reaction is inhibited and shifts backward.

• The reaction is favored and shifts forward.

• The reaction rate decreases.

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What is a common misconception about chemical reactions and equilibrium?

• Reactions can be manipulated by changing conditions.

• Reactions involve both forward and reverse processes.

• Reactions are static and end once equilibrium is reached.

• Reactions are dynamic and ongoing.