Mission TC3 Energy Change and Reactions

Mission TC3 requires that students understand the bond-breaking and bond-forming steps of chemical reactions and their associated energy changes. Students must also relate the relative energies of these two steps to the overall energy change, the release or absorption of energy by the system, and to energy level diagrams. The mission consists of 36 questions organized into 9 Question Groups.

• The student should be able to relate chemical potential energy changes of a system to the heat flow across the system boundary.
• The student should be able to use system diagrams and energy level diagrams to describe the effects of bond breaking and bond forming upon the potential energy of the system.

If you are not familiar with this topic, then you should first learn about the topic using our written Tutorial:

• Chemical Reactions and Energy