객관식
Which of the following best describes the effect of a catalyst on a chemical reaction?
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15. Chemical Kinetics
Catalyst
객관식
Which of the following best describes the effect of a catalyst on a chemical reaction?
A
It lowers the activation energy, increasing the reaction rate without being consumed.
B
It increases the activation energy, slowing down the reaction.
C
It is consumed during the reaction and becomes part of the products.
D
It changes the equilibrium position of the reaction.
검증된 단계별 안내1
Understand that a catalyst is a substance that affects the rate of a chemical reaction without being consumed in the process.
Recall that the activation energy is the minimum energy required for reactants to transform into products during a reaction.
Recognize that a catalyst works by providing an alternative reaction pathway with a lower activation energy, which increases the reaction rate.
Note that although a catalyst speeds up the reaction, it does not change the overall equilibrium position or the thermodynamics of the reaction.
Conclude that the best description of a catalyst's effect is that it lowers the activation energy, increasing the reaction rate without being consumed.
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