Why does heat speed up reactions?
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For substances to react, the atoms/molecules need to collide with enough speed at the right orientation.
Imagine a large room filled with people. You tell them to walk in a straight line even if it means colliding with another person.
Now imagine the same room with the same number of people, only this time you tell them to sprint as fast as they can. The number of collisions is going to greatly increase and the “force” of those collisions are going to be much greater.
This is effectively what happens when you increase the heat. The molecules are moving faster so you increase the number of collisions and with each collision having a greater impact.
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