Catalysts - b. Enzymes are very specific 6. Using the...

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Catalysts A catalyst is a substance which alters the rate of a chemical reaction but is chemical unchanged at the end of the chemical reaction. 1. The phrase catalyzed processes was coined by Jöns Jakob Berzelius in 1836 2. Only small quantities are required. a. Catalysts are not changed during a chemical reaction. 3. Alter the rate of a reaction a. Speed up a reaction i. “Positive catalysts” or “promoters” ii. “Negative catalysts” or “inhibitors” 4. Do not alter the position of equilibrium 5. Enzymes are biological catalysts a. Enzymes are catalysts in metabolism and catabolism.
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Unformatted text preview: b. Enzymes are very specific 6. Using the Kinetic Molecular Theory, catalysts increase the chance molecules collide. a. Intermediate compounds arrange the surface of the substances to collide in the proper orientation. b. Transition state theory . Products and reactants are in equilibrium with an intermediate “activated complex” or “transition state.” c. Activation energy (E a ) is lowered because a “different path” to the reaction occurs; that is, the transition state (activated complex) requires lower activation energy. Catalysts...
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Catalysts - b. Enzymes are very specific 6. Using the...

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