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(chemistry only) Explain that the fuel is oxidised electrochemically within a fuel cell.

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Topic

Chemical cells and fuel cells (chemistry only)

Subtopic

Fuel cells

Aqa Gcse ChemistryEnergy changes

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(chemistry only) Explain that the fuel is oxidised electrochemically within a fuel cell

  • This point belongs to Chemical cells and fuel cells (chemistry only), especially Fuel cells.
  • You need to be able to (chemistry only) Explain that the fuel is oxidised electrochemically within a fuel cell.
  • The key ideas to know are fuel cell and chemistry only.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

fuel cellchemistry only

Why it matters

This objective helps connect Fuel cells to exam-style questions, flashcards, and revision notes for Chemical cells and fuel cells (chemistry only).

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What should you know about (chemistry only) Explain that the fuel is oxidised electrochemically within a fuel cell?

Direct answer

In Chemistry, this page helps you answer questions about (chemistry only) Explain that the fuel is oxidised electrochemically within a fuel cell within Chemical cells and fuel cells (chemistry only). Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are fuel cell and oxidation.

Key terms

  • fuel cell: A device that converts chemical energy from a fuel into electricity through electrochemical reactions.
  • oxidation: A chemical process in which a substance loses electrons, often associated with the reaction of a fuel in a fuel cell.

Common trap

Misidentifying the Oxidation Step: In a hydrogen fuel cell, the fuel (hydrogen) is oxidised at the anode (H₂ → 2H⁺ + 2e⁻) and the oxygen is reduced at the cathode (O₂ + 4H⁺ + 4e⁻ → 2H₂O). The oxidation of hydrogen is the electrochemical reaction that generates electrons, not the reduction of oxygen.

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