
Interpretation: Out of the reactions given in the lesson, one reaction that is best source of energy needs to be explained.
Concept Introduction: Exothermic reactions are best source of energy. Exothermic reaction discharges energy into the surrounding from the system.

Answer to Problem 1E
The oxidation of aluminum to produce aluminum oxide is highly exothermic. So, in this lesson this reaction is the best source of energy.
Explanation of Solution
Oxidation reactions are good source of energy because they are always exothermic. So, oxidation reactions are a potential source of energy for our daily lives. To explore the usefulness of metal oxidation as an energy source, we must examine and compare the amount of thermal energy transferred during these reactions.
Decomposition of aluminum oxide is highly endothermic. A large amount of energy is required to extract pure aluminum from aluminum oxide.
The oxidation of aluminum to produce aluminum oxide is the best source of energy.
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