The Statue of Liberty is made out of copper and was once shiny and copper-colored. Over the years, the copper has gone through a process called oxidation, where it has changed into a new material. What has occurred? an endothermic reaction an energy formation a chemical reaction a precipitate formation

In this case, occurred a CHEMICAL REACTION known as oxidation.

A chemical reaction is a process where one or more substances called reactants can react to be converted into one or more products.

In conclusion, in this case, occurred a CHEMICAL REACTION known as oxidation.

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C. A chemical reaction.

Explanation:

A chemical reaction can be defined as a chemical process which typically involves the transformation or rearrangement of the atomic, ionic or molecular structure of an element through the breakdown and formation of chemical bonds to produce a new compound or substance.

Since the Statue of Liberty is made out of copper and was once shiny and copper-colored. Over the years, the copper has gone through a process called oxidation, where it has changed into a new material. Thus, this is a chemical reaction.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.