The diagram shows the initial activation energy
(energy needed to break initial bonds) and then
the negative enthalpy change
Endothermic Reactions
This diagram shows the positive enthalpy
change of an endothermic reaction. The energy
released from forming new bonds is subtracted
from the activation energy to give the final
amount.
Activation Energy can be lowered with catalysts
They provide a lower energy pathway to breaking initial bonds
This is represented by the lower red curve on
the diagram