Multiple Choice
Which of the following best describes the effect of increasing the temperature on the rate of a chemical reaction?
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15. Chemical Kinetics
Factors Influencing Rates
Multiple Choice
Which of the following best describes how increasing temperature affects the rate of a chemical reaction?
A
It has no effect on the rate of the reaction.
B
It increases the rate by providing more energy for collisions between reactant molecules.
C
It increases the rate by lowering the activation energy of the reaction.
D
It decreases the rate by causing reactant molecules to move more slowly.
Verified step by step guidance1
Understand that the rate of a chemical reaction depends on how often and how effectively reactant molecules collide.
Recall the collision theory, which states that molecules must collide with sufficient energy (activation energy) and proper orientation for a reaction to occur.
Recognize that increasing temperature increases the kinetic energy of molecules, causing them to move faster and collide more frequently.
Know that higher kinetic energy means a greater fraction of molecules have enough energy to overcome the activation energy barrier.
Conclude that increasing temperature increases the reaction rate by providing more energy for effective collisions, not by lowering activation energy or slowing molecules down.
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