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    why is the amount of energy that a particle has important to the rate of reaction and do all particles in a particular reaction have the same amount of energy??
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    More energy= faster movement=higer frequency of collisions= faster rate of reaction. And no, particles have a range of energies in a reaction.
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    Doing this half from memory so it may be incorrect but here goes:

    If a particle has too much energy it may not react with another particle, just simply bounce off. Also if it has too little energy it won't react. The particles must have a minimum amount of activation energy that allows it to react successfully. So no they definitely don't have the same amount of energy. To increase the amount of energy for the particles increase temperature. Particle size - more collisions when decreased and as for catalysts, they sort of hold particles in place so that when a particle looks for it and attempts to collide, it can do so with less energy - reaction can be done at a lower temperature. For most questions like these, google is your best friend
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