Final answer:
The reaction between aluminum and Copper II Sulfate + salt is considered exothermic because it releases heat energy. In exothermic reactions, the energy of the products is less than that of the reactants, hence causing a release of energy that is commonly observed as heat. Therefore, the correct option is A) It releases heat energy.
Step-by-step explanation:
In the reaction between aluminum and Copper II Sulfate + salt, it is considered exothermic because it releases heat energy. This is option 'a'. An exothermic reaction is characterized by the release of heat, where the energy of the products is less than that of the reactants. This means the excess energy was released into the surrounding environment as heat. There's a characteristic temperature rise during an exothermic reaction when performed in a closed environment.
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