Question

Draw labelled diagram of H\(_2\) – O\(_2\) fuel cell. Write two applications of fuel cell.

Hint:

Fuel cells convert chemical energy directly to electrical energy; H\(_2\)-O\(_2\) cells produce water as a byproduct.

Answer 1

Diagram:

Reactions: Anode: \( 2\text{H}_2 \to 4\text{H}^+ + 4e^- \), Cathode: \( \text{O}_2 + 4\text{H}^+ + 4e^- \to 2\text{H}_2\text{O} \).
Applications:
1. Power generation in spacecraft (e.g., Apollo missions).
2. Electric vehicle power sources for clean energy.