Multiple Choice
Which of the following factors will influence the rate of all chemical reactions?
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15. Chemical Kinetics
Factors Influencing Rates
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Which of the following best describes how increasing temperature affects the rate of a chemical reaction?
A
It increases the rate by providing more energy for collisions between reactant molecules.
B
It decreases the rate by causing reactant molecules to move more slowly.
C
It stops the reaction completely.
D
It has no effect on the rate of reaction.
Verified step by step guidance1
Understand that the rate of a chemical reaction depends on how often and how effectively reactant molecules collide with each other.
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, leading to an increased reaction rate.
Conclude that increasing temperature increases the rate of reaction by providing more energy for collisions between reactant molecules.
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