Transcription of Chapter 14 Chemical Kinetics - Oneonta
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Chapter 14 Chemical Kinetics - Oneonta
Chapter 14 Chemical Kinetics bv, 2 7 2009 I. Introduction Gasoline and air in a car engine explode violently, but left untouched, they will not react for years at a time. Meat left out will invite biochemical reactions that, among other thing, generate bad smelling gases. If kept at lower temperatures, these reactions take a much longer time to occur. Enzymatic reactions occur slowly at low temperatures and at high temperatures, but rapidly at intermediate temperatures. Why do some occur quickly, while others slowly? Why do some reactions occur at all while others do not? In other words, what controls Chemical reactivity? Chemical reactivity is controlled by two broad factors: thermodynamics and Kinetics . Thermodynamics considers the question: which state is more stable, reactants or products. Thermodynamics answers the question: should this reaction occur? Kinetics the subject of this Chapter considers the question: what controls the rate of a reaction? In order for a reaction to occur in a practical sense, it must be both thermodynamically and kinetically favored.
Chapter 14 Chemical Kinetics ‐bv, 2‐7‐2009 I. Introduction Gasoline and air in a car engine explode violently, but left untouched, they will not react for years at a
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