fuel cell

Question

In a hydrogen-oxygen fuel cell, the overall reaction is:

RankGuru · Accepted Answer

A **Fuel Cell** converts the chemical energy of a fuel (like hydrogen) directly into electrical energy.
- In the $H_2-O_2$ fuel cell (used in the Apollo space program):
1. **Anode**: $2H_2 + 4OH^- 	o 4H_2O + 4e^-$
2. **Cathode**: $O_2 + 2H_2O + 4e^- 	o 4OH^-$
- **Overall Reaction**: **$2H_2(g) + O_2(g) 	o 2H_2O(l)$**
- Advantages: It is highly efficient and produces only water as a byproduct, making it pollution-free.

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fuel cell

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