What is an electrochemical cell?

What is an electrochemical cell?

• A. A device that converts mechanical energy into thermal energy
• B. A device that converts chemical energy into electrical energy or vice versa
• C. A device that generates magnetic fields
• D. A device used solely for chemical reactions

Answer: (B)

An electrochemical cell is fundamentally defined as a device that converts chemical energy into electrical energy or vice versa. This conversion process occurs through electrochemical reactions, where chemical substances lose or gain electrons. In galvanic cells, for instance, spontaneous reactions generate electrical energy, usually utilized to power electronic devices. Conversely, in electrolytic cells, electrical energy is applied to drive non-spontaneous chemical reactions. This dual capability—allowing both the generation of electrical energy from chemical reactions and the use of electrical energy to drive chemistry—makes electrochemical cells versatile in applications ranging from batteries to electrolysis processes. The correct answer captures this essential function of electrochemical cells, illustrating their role in harnessing energy transformations which are central to many technological applications.

An electrochemical cell is fundamentally defined as a device that converts chemical energy into electrical energy or vice versa. This conversion process occurs through electrochemical reactions, where chemical substances lose or gain electrons. In galvanic cells, for instance, spontaneous reactions generate electrical energy, usually utilized to power electronic devices. Conversely, in electrolytic cells, electrical energy is applied to drive non-spontaneous chemical reactions.

This dual capability—allowing both the generation of electrical energy from chemical reactions and the use of electrical energy to drive chemistry—makes electrochemical cells versatile in applications ranging from batteries to electrolysis processes. The correct answer captures this essential function of electrochemical cells, illustrating their role in harnessing energy transformations which are central to many technological applications.