[maccha]

Okay, I have a question about potential energy diagrams that has always confused me. Take a look at this link : http://people.sps.lane.edu/jtyser/chem/P...

Since the potential energy is greater after the reaction, this reaction is said to be endothermic.. since it "took in" energy. What I don't understand though, it that since KE + PE = constant, wouldn't this mean that kinetic energy was therefore lower? And if kinetic energy was lower than before, wouldn't the molecules move less fast and therefore be at a lower temperature, making the reaction exothermic? If someone could explain this to me I would really appreciate it.

[Astrokel]

I cannot see the diagram linked and also conservation of energy is only applicable to system that has no friction and nor it is subjected to external influence.