The Rate of a Chemical Reaction Increases with an Increase

question 61

Multiple Choice

The rate of a chemical reaction increases with an increase in temperature.Which of the following correctly explains why?

• A)At higher temperatures,the activation energy is increased.
• B)At higher temperatures,the activation energy is decreased.
• C)At higher temperatures,more reactant molecules are present and collisions occur more frequently.
• D)At higher temperatures,reactant molecules move faster,collide more often,and produce more effective collisions.
• E)At higher temperatures,a catalyst is usually present.

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