We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byNicole Thorpe
Modified over 4 years ago
Chemical Kinetics Reaction rate - the change in concentration of reactant or product per unit time.
Factors Affecting RatesTemperature Concentration of reactants Particle size Presence of a catalyst
Rates Average rates - the difference in concentration over a set amount of time. Table 12.2 Instantaneous rates - calculated from the slope of the line tangent to the curve at a certain point.
Reaction rates Rates are not constant. Rates vary with time because concentrations vary with time.
Rate Laws Rate = k[A]n[B]m[C]p k = rate constant n,m,p = order ; must be determined by experiment.
Differential rate law Expresses how a rate depends on concentration. Often this is just called the rate law.
Integrated rate law Expresses how the concentration depends on time.
Reaction Mechanism The series of elementary steps by which a reaction occurs. An elementary step is a step whose rate law can be determined from its molecularity.
Molecularity The number of species that must collide to produce the reaction in that step. Unimolecular involves one molecule. Bimolecular and termolecular involve 2 and 3 species respectively
Intermediate A species that is neither a reactant or a product. This species is produced and consumed in the reaction.
Rate Determining Step This is the slowest step of the mechanism. The reaction can only proceed as fast as this rate determining step will allow.
Requirements of MechanismsThe sum of the elementary steps must give the overall balanced equation. The mechanism must agree with the experimentally determined rate law. The rate determining step.
Collision model for kineticsReactant molecules must collide in order to react. Concentration Particle size Temperature Molecular orientation
Requirements for reactionThe collision energy must equal or exceed the activation energy. The orientation of the reactants must allow the formation of new bonds.
CHEMICAL KINETICS CHAPTER 17, Kinetics Fall 2009, CHEM
16-1 Copyright ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 14 Kinetics: Rates and Mechanisms of Chemical.
Kinetics Quick Review. Radioactive Decay and Kinetics.
AP CHEMISTRY CHAPTER 12 KINETICS
Chapter 12 Chemical Kinetics
AP Chapter 14. Chemical kinetics is the area of chemistry that involves the rates or speeds of chemical reactions. The more collisions there are between.
Chpt 12 - Chemical Kinetics Reaction Rates Rate Laws Reaction Mechanisms Collision Theory Catalysis HW: Chpt 12 - pg , #s Due Fri Jan. 8.
CHAPTER 12: KINETICS Dr. Aimée Tomlinson Chem 1212.
Chemical Kinetics. Chemical kinetics - speed or rate at which a reaction occurs How are rates of reactions affected by Reactant concentration? Temperature?
Chapter 14 Chemical Kinetics *concerned with speed or rates of chemical reactions reaction rate- the speed at which a chemical reaction occurs reaction.
Chapter 16: Kinetics Rates and Mechanisms of Chemical Reactions 16.1 Factors That Influence Reaction Rate 16.2 Expressing the Reaction Rate 16.3 The Rate.
Reactants must collide with proper orientation and sufficient energy.
Copyright©2000 by Houghton Mifflin Company. All rights reserved. 1 Chemical Kinetics The area of chemistry that concerns reaction rates.
Collision Theory. Reaction Coordinate Diagrams Multistep Reactions.
Collision Theory. Reactions are fastest with… 1.Large Ea, Large T 2.Low Ea, Large T 3.Large Ea, Low T 4.Low Ea, Low T.
CHE MODULE 3 CHAPTER 15 LECTURE NOTES. Chemical Kinetics Chemical kinetics - study of the rates of chemical reactions and is dependent on the.
Reaction Rate Change in concentration of a reactant or product per unit time. [A] means concentration of A in mol/L; A is the reactant or product being.
Chapter 12 Chemical Kinetics. Chapter 12 Table of Contents Copyright © Cengage Learning. All rights reserved Reaction Rates 12.2 Rate Laws: An.
Chapter 15 Kinetics. Kinetics Deals with the rate of chemical reactions Deals with the rate of chemical reactions Reaction mechanism – steps that a reaction.
© 2018 SlidePlayer.com Inc. All rights reserved.