Bond Energy Changes Simulator

HS-PS1-4: Chemical Reactions and Bond Energy

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. Breaking bonds absorbs energy (+), and forming bonds releases energy (-).

1. Select Reaction

Bond Energy Table

Bond Energy (kJ/mol)

2. Reaction Progress

Reactants (Initial State)

Products (Final State)

Reactants Transition State Products

Energy Profile

Energy Accounting

Energy Absorbed
Breaking Reactant Bonds
+0 kJ
Energy Released
Forming Product Bonds
-0 kJ
Net Energy Change (ΔH)
0 kJ
Perform the reaction to see the net energy change.