5
http://www.kentchemistry.com/links/Matter/EndoExo.htm
http://chemistry.about.com/cs/generalchemistry/a/aa051903a.htm
http://chemwiki.ucdavis.edu/Physical_Chemistry/Equilibria/Le_Chatelier's_Principle/Effect_Of_Temperature_On_Equilibrium_Composition/Exothermic_Versus_Endothermic_And_K
http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml
Chapter 22 PPT
http://www.diffen.com/difference/Nuclear_Fission_vs_Nuclear_Fusion