Chapter 16

Chapter 16 - Enrichment Rate Equations to Determine...

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Enrichment – Rate Equations to Determine Reaction Order -Equation for a straight line: y = mx + b -rearranged rate law for first order: ln [A] = -a k t + ln[A] 0 Do the three plots: which one is linear? -versus time: zero order -ln versus time: first order -inverse versus time: second order Example 16-9 Pg. 254 of lecture online Slope = -0.20 = -k Thus the rate constant k = 0.20 min -1 -rearranged rate law for second order: 1/[A] = a k t + 1/[A] 0 Example 16-10 Slope = 0.90 = 2k Thus the rate constant k = 0.45 M -1 min -1 Collision Theory of Reaction Rates -three basic events must occur for a reaction ot occur. The atoms, molecules or ions must: 1. collide 2. Collide with enough energy to break and form bonds. 3. Collide with the proper orientation for a reaction to occur -one method to increase the number of collisions and the energy necessary to break and reform bonds is to heat the molecules -effective collision Transition State Theory -the relationship between the activation energy for forward and reverse reactions
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Chapter 16 - Enrichment Rate Equations to Determine...

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