How do changes in temperature affect the rate of a reaction?A.Increasing temperature increases the reaction rate because the particles move faster and collide more often.B.Increasing temperature decreases the reaction rate because the particles break down into nonreactive substances.C.Decreasing temperature increases the reaction rate because the particles are more likely to react when they collide.D.Changing temperature does not affect the rate of a reaction because it does not change the activation energy.
Question
How do changes in temperature affect the rate of a reaction?A.Increasing temperature increases the reaction rate because the particles move faster and collide more often.B.Increasing temperature decreases the reaction rate because the particles break down into nonreactive substances.C.Decreasing temperature increases the reaction rate because the particles are more likely to react when they collide.D.Changing temperature does not affect the rate of a reaction because it does not change the activation energy.
Solution
The correct answer is A. Increasing temperature increases the reaction rate because the particles move faster and collide more often.
Here's why:
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Temperature is a measure of the average kinetic energy of particles in a substance. When the temperature increases, the particles gain more kinetic energy.
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With more kinetic energy, the particles move faster. This increases the frequency of collisions between reactant particles.
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More collisions increase the chances of the particles having the necessary activation energy to react. This is because a higher kinetic energy means a higher speed, and a higher speed means a higher energy of collision.
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Therefore, when the temperature increases, the rate of reaction also increases because there are more successful collisions per unit of time.
The other options are incorrect. Increasing temperature does not cause particles to break down into nonreactive substances (option B). Decreasing temperature does not increase the reaction rate; it actually decreases it because there are fewer successful collisions (option C). And changing temperature does indeed affect the rate of a reaction by changing the frequency of successful collisions (option D).
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