Chemistry: (e) Kinetics and Thermochemistry

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  1. kinetics
    study of speed or rate of reaction under various conditions
  2. For two molecules to collide, they must...
    • 1) collide in an effective way
    • 2) have energy as grat as activiation energy
  3. What is activation energy?
    Energy that gets reaction going
  4. What five factors affect reaction rate?
    • concentration of R
    • temperature
    • surface area of R
    • catalysts
    • reaction mechanism
  5. What is the reaction mechanism?
    sequence of reactions leading to overall reaction
  6. What is the rate determining step?
    slowest step of mechanism
  7. What is the enthalpy of a reaction?
    heat transferred into or out of a system
  8. What is an exothermic reaction?
    reaction that releases energy
  9. What is an example of an exothermic reaction?
    charcoal like substance precipitate reaction
  10. What is an endothermic reaction?
    heat is taken in
  11. What is an example of an endothermic reaction?
    the beaker frozen to the block demonstration
  12. What does a catalyst do and how does it do it?
    speeds up reaction by lowering activation energy.
  13. With a catalyst, does the change in energy (delta H) change?
    no, it just happens faster
Card Set:
Chemistry: (e) Kinetics and Thermochemistry

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