What is a common feature of galvanic cells?

Galvanic cells are characterized by their ability to convert chemical energy into electrical energy through spontaneous electrochemical reactions. This process occurs when a redox reaction takes place, leading to the flow of electrons from one electrode to another, generating an electric current. In a galvanic cell, the reaction is exothermic, meaning it occurs naturally without the need for an external energy source, unlike electrolytic cells, which require energy input to drive non-spontaneous reactions.

The conversion of chemical energy to electrical energy is fundamental to the operation of galvanic cells, as it is this energy transformation that allows them to be utilized in batteries and other applications where electrical power is needed.