What distinguishes a fuel cell from a battery?

• A. A fuel cell is rechargeable
• B. A fuel cell generates heat
• C. No heat is generated by a fuel cell
• D. A fuel cell has liquid electrolytes

Answer: (C)

A fuel cell is fundamentally different from a battery due to its operation and energy conversion process. One key distinction is that a fuel cell generates electricity through an electrochemical reaction between a fuel (commonly hydrogen) and an oxidant (usually oxygen), producing water and heat as byproducts. In this context, stating that no heat is generated by a fuel cell does not align with its operation. Instead, heat is indeed produced as a byproduct of the reaction, similar to combustion processes.

On the other hand, batteries store electrical energy chemically and release it as needed; they typically involve a closed-loop system where the reactions occur internally with no external fuel supply required. In contrast, fuel cells continuously produce electricity as long as they have a supply of fuel and oxidizer.

So, while fuel cells can be similar to batteries in terms of providing electrical power, their operational mechanisms and byproducts significantly make them distinct, with heat generation being one of those key characteristics. Therefore, it is important to recognize the accurate points about fuel cell operations when differentiating them from batteries.