Ch15_Kinetics_1 - Kinetics Chapter 15 1 Speeds at Which...

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1 Kinetics Chapter 15
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2 Speeds at Which Reactions Occur  Kinetics:    Study of factors that govern  How  rapidly  reactions occur How reactants  change  into products? Rate of Reaction Speed  with which reaction occurs products form.
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3 Important Questions that Kinetics  Answers Practical value!!  Chemical /pharmaceutical manufacturers Is it  practical  to make drug? Made on  manageable  time scale?  Can we adjust conditions to  improve Mechanism of Reaction Series  of individual steps leading to overall observed  reaction. How reactants  change  into products? Detailed  sequence of events.
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4 Factors that Affect Reaction Rates  1. Chemical nature of reactants. What  elements, compounds, salts are  involved ? What  bonds  must be  formed broken ? What are  fundamental   differences  in  chemical reactivity.
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5 Factors that Affect Reaction Rates  2.  Ability of reactants to come in contact with  each other. If 2 or more reactants must   meet  (come together) in order to react. Gas  or  solution  phase  facilitates  this Reactants  (molecules or ions) intermingle (mix) and  collide with each other easily. Homogeneous reaction —all reactants in  same   phase,   occurs rapidly Heterogeneous reaction —reactants in  different   phases (i.e. one gas, one liquid or solid.) Reactants meet only at  interface  between phases Area  of contact (surface area) determines reaction  rate  area,   rate  area,   rate
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6 Factors that Affect Reaction Rates 3. Concentrations of reactants.
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This note was uploaded on 09/02/2008 for the course CHEM 1220 taught by Professor Meghee during the Spring '08 term at St. Johns Duplicate.

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Ch15_Kinetics_1 - Kinetics Chapter 15 1 Speeds at Which...

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