ch 14 notes - Chem Notes Chapter 14 Chemical Kinetics 14.1...

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Chem Notes Chapter 14 Chemical Kinetics 14.1 Four factors that allow us to change the rates at which particular reactions occur: 1. Physical state reactants a. Molecules MUST collide in order to react b. The faster, the more likely to react c. When reactants are in different states, the reaction is limited to their area of contact 2. concentration of reactants a. reactions proceed faster if concentration is INCREASED b. concentration increases, frequency of collisions increases 3. Temperature at which reaction occurs a. Temp increases, reaction rates increase b. Molecules move more rapidly with increasing heat, collisons increase, which increases rate of reaction 4. presence of a catalyst a. catalysts increase rxn b. affect the kinds of collisions c. enzymes are natural catalysts in our bodies 14.2 Reactions Rates Speed= defined as the change that occurs in a given interval of time Reaction rate= speed of a chemical reaction – change in concentration of reactants or products per unit time
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This note was uploaded on 03/30/2008 for the course CHEM 210 taught by Professor Maslak,przemyslaw during the Spring '08 term at Pennsylvania State University, University Park.

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ch 14 notes - Chem Notes Chapter 14 Chemical Kinetics 14.1...

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