Rate Affecting Factors

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Presentation transcript:

Rate Affecting Factors

Reactants must collide in order to react Collision theory Reactants must collide in order to react Activation energy Minimum amount of energy colliding particles need in order to react. Fast Enough AND Correct Orientation

Factors of Reaction Rate Temperature Concentration Surface area Catalysts Increase any of these, you get more collisions…so it goes faster!

Temperature Higher temperature = Higher kinetic energy = More likely to get over the activation curve = faster rate

Concentration Higher Concentration = More particles = More chances of proper collisions = Faster rate TO A POINT!!!

Surface Area More Surface Area = More access to chemicals = more collisions = faster rate

Catalysts What is it? - A chemical that you add to reaction - Does NOT get used up during reaction - Helps orient molecules to reach transition state easier - So you do not need as much energy - Lowers Activation Energy = faster reaction

Changes # of Collisions Changes Activation Energy Temperature Surface Area Concentration 1) Catalyst BECAUSE it changes the # of EFFECTIVE collisions