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REACTION RATES: KINETICS

REACTION RATES: KINETICS. Rate that reactants turn into products 5 FACTORS AFFECTING REACTION RATES 3 factors relate to energy 2 factors relate to solutions. Review collision theory. Chemical reactions happen when atoms and compounds collide with each other

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REACTION RATES: KINETICS

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  1. REACTION RATES: KINETICS • Rate that reactants turn into products 5 FACTORS AFFECTING REACTION RATES 3 factors relate to energy 2 factors relate to solutions

  2. Review collision theory • Chemical reactions happen when atoms and compounds collide with each other • Collide with sufficient force to break bonds • Collide in the right position (orientation)

  3. Energy & kinetics (rate) • 1. temperature: increases temp INCREASES reaction rates Why? *particles move faster and collide with greater intensity 2. agitation: increases reaction rate Why? *increases likelihood ofparticles being exposed to one another; increase in collisions examples: shaking, stirring

  4. Energy & kinetics 3. catalysts: substance that increases the reaction rate without being used up in the reaction. Why? * lowers the ACTIVATION energy; sort of “invites” reacting particles together so they will react

  5. Solutions & kinetic • concentration: increasing concentration of reactants increases rate Why? *increasing # particles increases chance of collision resulting in a reaction

  6. 2. surface area: increasing will cause reaction rate to increase Why? *greater exposure of reacting particles to each other examples: pulverizing, crushing, chopping up, etc

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