
Exothermic vs. Endothermic Reactions
12th Grade · Science · 45 min
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Learning Objective
I can differentiate between exothermic and endothermic reactions based on energy transfer.
- 1
In an exothermic reaction, heat is released from the reaction, while in an endothermic reaction, heat is absorbed.
- 2
In an exothermic reaction, the reactants have more energy than the products, resulting in a downhill energy diagram.
- 3
Activation energy is the energy required to initiate a reaction by pressuring the bonds of the reactants.


