Electrochemical Energy Convertors Lecture

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Questions and Answers

What is the primary function of a fuel cell?

  • To convert chemical reactions into electrical energy with high efficiency (correct)
  • To store electrical energy with 100% efficiency
  • To generate chemical energy from electrical reactions
  • To produce heat through combustion reactions

What is the example of an electrochemical generator of a fuel cell mentioned in the text?

  • The Lithium-ion battery
  • Natural Gas and CO Air Fuel Cells
  • The Lead-acid battery
  • The Hydrogen-Oxygen fuel cell (correct)

What are the reactions taking place at the anode and cathode in the Hydrogen-Oxygen fuel cell?

  • 2𝐻2 𝑂 → 2𝐻2, 4𝐻 → 4𝐻 + + 4𝑒
  • 4𝐻 + + 4𝑒 → 2𝐻2 𝑂, 𝑂2 → 4𝐻 + + 4𝑒
  • 4𝐻 → 4𝐻 + + 4𝑒, 𝑂2 + 4𝐻 + + 4𝑒 → 2𝐻2 𝑂
  • 2𝐻2 → 4𝐻 + + 4𝑒, 𝑂2 + 4𝐻 + + 4𝑒 → 2𝐻2 𝑂 (correct)

How are reactants supplied to electrodes in electricity storage systems?

<p>Placed on the electrodes and not fed from outside the cell (A)</p> Signup and view all the answers

What is used as an electrolyte in the Hydrogen-Oxygen fuel cell?

<p>Cation-exchange membrane (D)</p> Signup and view all the answers

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