Principles of Chemical Science

Lecture 15: Thermodynamics: Bond and Reaction Enthalpies

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Topics

Thermodynamics Bond Energy / Bond Enthalpy (∆HB) Enthalpies of Reaction (∆Hr) Methods to Calculate ∆Hr

Lecture Video

Thermodynamics is key to understanding the reactivity of molecules and compounds. In this first of three lectures on thermodynamics, viewers are introduced to ∆H, and asked to consider how much heat it will take to break one type of molecular bond versus another. Viewers are also asked whether a particular chemical reaction will release heat or absorb heat.

Lecture Notes

Notes for Lecture 15 (PDF)

Clicker Questions

Lecture 15 Clicker Questions (PDF)

Textbook Reading

TOPICS	5th EDITION	4th EDITION
The Enthalpy of Chemical Change	Sections 7.13, 7.15, 7.16, 7.17, 7.18, and 7.20	Sections 6.13, 6.15, 6.16, 6.17, 6.18, and 6.20

Problems and Solutions

Problems for Lecture 15 (PDF)

Solutions for Lecture 15 (PDF)

Acknowledgement

Excerpt of “Photosynthesis” by They Might Be Giants, courtesy of Idlewild / Disney Sound, used with permission. From Here Comes Science, 2009

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