SLO 3.2 Bond Energy
Describe the electronic structure of matter using data and models
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Key Concepts and Skills
- Enthalpy: Classify processes as endothermic or exothermic
- Formation Molecular(Covalent) Bonds: Recognize the relationship between Coulombic attraction between charged particles and how this plays out when atoms combine to form a bond.
- Bond Energy: Determine relative bond energies based on bond orders and atom size.
- Enthalpy of Reaction: Explain the relationship between exothermicity/endothermicity of processes including bond making/breaking. Calculate the enthalpy of a given reaction given a table of bond energies.
- Enthalpy Atom Combination: Explain the process of atom combination and the relationship between bond order/bond strength and enthalpy of atom combination. Calculate the enthalpy of atom combination for a given molecule.
Reading
- From the textbook:
- I advise ignoring the textbook for this unit - it uses a different convention (\(\Delta H_f\) rather than \(\Delta H_{ac}\)). The gist is the same, but the numbers and equations will look slightly different.
- POGIL Activities
- CA-13: Are All Bonds the Same?
- CA-32: Is Energy Released or Used When a Bond Breaks?
- CA-33: Is Energy Released or Consumed When a Reaction Occurs?
- Other:
Important Terms
| Enthalpy | Lewis Structure |
| Exothermic | Bond Order |
| Endothermic | Bond Energy |
| Atom Combination |
Sample Assessment Questions
Dr. Thompson Videos
-
Enthalpy of Atom Combination
-
Enthalpy Reaction Diagram
External Videos, Tutorials, Simulations
- Bond Order, Bond Lengths, Bond Strengths
- Enthalpy of Reaction
- Bond Length and Bond Energy
- Crash Course Chemistry - Bonding Models
Practice Problems
- From the textbook:
- None
- From other external sources:
- From Dr. Thompson (links and embedded versions below):