There are a number of ways to measure the progress of the oxidation reaction.
It is also done because liquid water is necessary for most of the oxidation reactions to occur.
In the human body, these oxidation reactions are catalyzed by enzymes.
Another oxidation reaction is the basis of the silver mirror test.
A high positive indicates an environment that favors oxidation reaction such as free oxygen.
The oxidation reaction can be performed with or without the copper metal.
The higher the ambient temperature, the more quickly the oxidation reactions proceed.
A reduction reaction always comes together with an oxidation reaction.
Despite the name, an oxidation reaction does not necessarily need to involve oxygen.
But the convention is to use the heat of the oxidation reaction, with the water substance produced being in the liquid phase.