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  • 21-09-2018
  • Biology
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What is energy? A change

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briana4244
briana4244 briana4244
  • 21-09-2018
If two substances react and the temperature of the mixture increases, the reaction is exothermic. A chemical reaction involves the breaking of bonds in the reactants and the forming of bonds in the products. It takes energy to break bonds. Energy is released when bonds are formed.
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