5.111SC | Fall 2014 | Undergraduate

Principles of Chemical Science

Unit V: Chemical Kinetics

Lecture 33: Kinetics and Temperature

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Image excerpted from Lecture 33 Notes 

  1. Effect of Temperature on Reaction Rates
  2. The Reaction Coordinate and the Activation Complex

Lecture Video

Using liquid nitrogen, we observe that lowering the temperature slows reaction rates. The concept of activation energy is introduced; there is always some energy needed when two molecules come together that allows them to react. Only molecules that have this critical energy, and can overcome this activation energy barrier, will react and go on to product. Lower temperature means that fewer molecules with have this critical amount of energy.

Lecture Notes

Notes for Lecture 33 (PDF)

Clicker Questions

Lecture 33 Clicker Questions (PDF)

Textbook Reading

Models of Reactions Sections 14.11–14.13 Sections 13.11–13.13

Problems and Solutions

Problems for Lecture 33 (PDF)

Solutions for Lecture 33 (PDF)

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Fall 2014
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