2. Kinetics Chapter 19

3. Kinetics (chemistry)  Branch of chemistry that investigates the rates of chemical reactions.  Reactions result from the collision of particles: ions, molecules, atoms.

4. Review  What are the 6 types of reactions?

5. 6 Types of Reactions  Combustion  Decomposition  Synthesis  Single displacement  Double displacement  Acid base reaction

6. Collision Theory

8. Activation Energy  The energy required for a reaction to proceed  Results in the formation of a transition state.

10. Factors that affect reaction rate TTemperature CConcentration PParticle size CCatalyst

11. Increase in Temperature:  increases the speed of particles  increases the number of collisions  increases the energy of the collisions

12. An Increase in Concentration Increases:  the number of collisions  the likelihood of collisions with sufficient energy  the likelihood the collisions with have enough energy

13. Particle Size DDecreasing the particle size increases the surface area to volume ratio MMore surface area, the faster the reaction

15. Catalyst  Catalyst provide a surface area for a reaction to occur.  By orienting the particles to the correct position, reaction requires less energy to proceed.  Lower activation energy, faster reaction

16. Catalyst  By orienting the particles for a more efficient collision the activation energy is reduced allowing the reaction to proceed faster