Answer:
they perform slightly different functions because voltaic cells involve spontaneous reactions while electrolytic cells do not.
Step-by-step explanation:
First, it is necessary to explain the difference between a spontaneous and non-spontaneous process. A spontaneous process is one where a chemical transformation occurs without the influence of an external factor, whereas the non-spontaneous process allows a chemical reaction to occur without just the interference of an external factor.
A voltaic cell allows the conversion of chemical energy into electrical energy without the need for external factors and therefore it is a system where a spontaneous process occurs. Electrolytic electrolytic cells, on the other hand, transform electrical energy into chemical energy, but they need the stimulation of an electric current, that is, they need an external factor.