605Catalysis

605Catalysis - Catalysis A catalyst increases the rate of...

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Lesson 30 1 Lesson 30 Catalysis • A catalyst increases the rate of reaction by providing a different reaction path with lower activation energy • The catalyst participates in the reaction, but it is not altered by the reaction • Therefore, the catalyst does not appear in the overall chemical reaction as a reagent or product • Catalysts are classified as homogeneous or heterogeneous Lesson 30 Homogeneous Catalysis A homogeneous catalysts is dissolved in the reaction medium throughout the reaction. Consider the following decomposition reaction: H COOH → H 2 O + CO Without a catalyst, this reaction requires that the H atom be transferred from the C atom to the O atom connected to the other H atom. The activation energy for this reaction is high and, therefore, its reaction rate is low. H + is a homogeneous catalyst for this reaction because it provides an alternative path for this reaction to occur, as indicated in the next slide. Lesson 30
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This note was uploaded on 11/29/2011 for the course CHE 102 taught by Professor Simon during the Fall '08 term at Waterloo.

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605Catalysis - Catalysis A catalyst increases the rate of...

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