Review...
Recall the
following
graphs from
the previous
unit:
Endothermic Reaction Diagram

The reactants have less potential energy
than the products. Energy must be put in to
raise the particles up to the higher energy
level.
Exothermic Reaction Diagram

The reactants have more potential energy
than the products have. The extra energy is
released to the surroundings.
Oh yes, we can...