Simulations & Videos for

Lesson 6.4: Temperature and Rate of a Chemical Reaction

Molecules Collide and React

  • 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.

Youtube ID: LCvSr40SbpA


  • 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.

Video used with permission from Chemical Education Exchange (ChemEd X)