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 Video Lesson

About This Video

Curriculum-aligned Grade 9 Science lesson video for 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. Use it for classroom preview, instruction support, or home review.

This watch page is dedicated to the video. For the complete text lesson plan, activities, standards alignment, and answer guides, use the companion lesson page: 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 lesson plan.

Video Learning Notes

In this lesson, students learned that chemical reactions involve breaking and forming bonds, which requires or releases energy. The total energy change depends on the balance between energy absorbed breaking bonds and energy released forming new bonds. By developing and revising models, students visualized and explained how energy changes occur in chemical reactions, deepening their understanding of bond energy and energy conservation.

Learning Goals

• Explain how energy is absorbed or released during chemical reactions based on changes in total bond energy.
• Develop and use models (diagrams, graphs, or molecular drawings) to represent energy changes in chemical reactions.
• Analyze how breaking bonds requires energy input and forming bonds releases energy.
• Use evidence to support explanations about energy changes in chemical reactions.
• Revise models or explanations based on feedback and new evidence.

Curriculum Context

Grade: Grade 9

Subject: Science

Curriculum: NGSS