Exothermic and endothermic chemical reactions differ in that
A) energy is given off only in exothermic reactions.
B) energy is given off only in endothermic reactions.
C) the total energy in all involved electrons is the same before and after an exothermic reaction.
D) the total energy in all involved electrons is the same before and after an endothermic reaction.
E) only exothermic reactions can be observed in everyday life.
Correct Answer:
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