객관식
Which of the following actions will increase the rate of a chemical reaction?
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15. Chemical Kinetics
Factors Influencing Rates
객관식
Which of the following is most likely to decrease the rate of a chemical reaction?
A
Lowering the temperature
B
Adding a catalyst
C
Increasing the concentration of reactants
D
Increasing the surface area of a solid reactant
검증된 단계별 안내1
Understand that the rate of a chemical reaction depends on factors such as temperature, concentration, surface area, and catalysts.
Recall that increasing temperature generally increases reaction rate because particles have more kinetic energy and collide more frequently and energetically.
Recognize that adding a catalyst lowers the activation energy, which increases the reaction rate without being consumed.
Know that increasing the concentration of reactants or the surface area of a solid reactant increases the frequency of effective collisions, thus increasing the reaction rate.
Conclude that lowering the temperature reduces the kinetic energy of particles, leading to fewer effective collisions and a decrease in the reaction rate.
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