In this video you will learn all the science for this topic to get a grade 9 or A* in your science exams!
Energy change = total energy in - total energy out. The energy in the reactants and products changes during the reaction. Both types of reactions have an activation energy that needs to be met to start the reaction; however endothermic reactions have much bigger activation energies as more energy is needed to start the reactions. Exothermic reactions have negative overall energy changes, whereas endothermic reactions have positive overall energy changes.
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