____________ reaction happens when energy is released to the surroundings and the temperature of the surroundings increases.
Exothermic
_____ reaction happens when energy is absorbed from the surroundings and the temperature of the surroundings decreases
Endothermic
When an exothermic reaction takes place, the reaction mixture gives out heat because more energy is ____ when new bonds are formed than is taken in when existing bonds in the reactants are broken.
released
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