Lesson 6.4: Temperature and Rate of a Chemical Reaction

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Molecules Collide and React

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• For molecules to react, they need to collide with enough energy.
• If molecules hit with too little energy, they can just bounce off without reacting.
• If they collide with enough energy, bonds can break and new bonds can form in a chemical reaction.

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• The reactants just sit there until energy is added with the flame.
• The added energy is enough to make molecules move fast enough to react.
• The energy produced in the reaction is enough to keep the reactants breaking bonds and making new bonds.