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.

This is the data

Activation energy Enthalpy change

Synthesis reaction 45 KJ +35 KJ

Single replacement reaction 20KJ -35 KJ

Double replacement 65 KJ +50KJ