An exothermic reaction ____ energy in the form of heat into its surroundings. An endothermic reaction ____ energy in the form of heat from its surroundings. This means an exothermic reaction will become ____ as the chemical reaction proceeds and an endothermic reaction will become ____ as the reaction proceeds. In other words, the products in an endothermic reaction will have ____ energy than the reactions but the products in an exothermic reaction will have ____ energy than the reactants. For example, baking a cake represents an ____ reaction and the explosion of fireworks represents an ____ reaction. Overall, energy is ____ in both types of chemical reactions.

Endothermic & Exothermic Reactions

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