HS-PS1-4 - Performance Expectation
Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
High School · Next Generation Science Standards · NGSS Lead States 2013
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
modelrelease of energyabsorption of energychemical reaction systemchangestotal bond energychemical reaction
Skills
- develop (models that illustrate energy changes in chemical reactions) #dok2
- interpret (data or models showing release or absorption of energy in chemical systems) #dok2
- analyze (how changes in bond energy affect total energy in a chemical reaction) #dok3
- compare (chemical reactions based on their energy changes) #dok2
- explain (the relationship between bond energy change and energy released or absorbed) #dok3
Learning Targets
- I can define bond energy and explain its role in chemical reactions. #dok1
- I can identify when energy is released or absorbed during a chemical reaction. #dok1
- I can use a model to describe changes in total bond energy during a chemical reaction. #dok2
- I can develop a model to illustrate how bond energy changes relate to energy transfer in a chemical reaction. #dok2
- I can analyze how the breaking and forming of bonds contributes to overall energy change in a reaction. #dok3
- I can explain how the interplay of bond breaking and bond formation determines whether a reaction is exothermic or endothermic. #dok3
Big Ideas
- The release or absorption of energy in a chemical reaction system depends on the changes in the total bond energy of the reactants and products.
- Models can help us visualize and understand how bond energy changes govern energy transfer in chemical reactions.
Essential Questions
- How do bonds breaking and forming during chemical reactions affect the total energy of a system?
- Why do some chemical reactions release energy while others absorb it?
- How can models help us understand energy changes in chemical reactions?
- What role does total bond energy play in determining whether a reaction is exothermic or endothermic?
- How can you predict the energy change of a reaction based on bond energies?
