Write a two to four sentence conclusion statement explaining how the potential energy diagram is used to identify if the reaction is endothermic or exothermic, if heat was released or absorbed, and why the sign of enthalpy change was positive of negative. There should be a conclusion statement for each graph.

Generic Reactions Reactants Products Transition State
Synthesis
A + B → AB A + B −15 kJ AB 20 kJ 30 kJ
Single Replacement
C + AB → CB + A
C + AB 65 kJ CB + A 30 kJ 85 kJ
Double Replacement
AB + CD → AD + BC AB + CD 10 kJ AD + BC 60 kJ 75 kJ