Final answer:
When heat is added to a reaction, the atoms move faster and collide more, increasing the reaction rate.
Step-by-step explanation:
When heat is added to a reaction, the atoms in the reaction will move faster and therefore they will collide more. This increased speed and collision frequency can lead to an increase in the rate of the reaction. Heat provides energy to the atoms, allowing them to overcome activation energy barriers and facilitating more successful collisions.
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