Here's why:
* Electrolytic cells drive non-spontaneous reactions: They use electrical energy to force a chemical reaction to occur in a direction that would not happen naturally. This is the opposite of a galvanic cell, which generates electrical energy from a spontaneous chemical reaction.
* Energy is absorbed: The electrical energy supplied to the electrolytic cell is used to overcome the energy barrier of the non-spontaneous reaction. This energy is absorbed by the system, not released.
Think of it this way:
Imagine pushing a heavy rock uphill. You're putting in energy to force the rock to move against gravity. Similarly, an electrolytic cell puts in energy to force a chemical reaction to proceed in a direction it wouldn't naturally go.
Examples of electrolytic cells:
* Electroplating: Deposition of a metal onto an object.
* Electrolysis of water: Breaking down water into hydrogen and oxygen gas.
* Production of aluminum: Extracting aluminum from its ore using electricity.
In all these cases, electrical energy is used to drive the reaction forward.
