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energy in reactions
energy is conserved, when a chemical reaction occurs, energy is tranferred either to or from the surroundings
exothermic reactions
reactions in which energy is given out to the surroundings, they have more energy than they started with
many oxidation reactions
combustion reactions ( burning )
combines w/ oxygen and water
examples of exothermic reactions
Endothermic reaction
energy is taken in during the reaction, meaning that the surroundings have less energy than they started with.