C7 - Hydrogen Fuel Cells

In the image is an acidic hydrogen fuel cell. Which electrode is the arrow pointing to?

• Negative electrode

• Positive electrode

In the image is an acidic hydrogen fuel cell. The half reaction occurring at the identified electrode is...

• O₂ (g) + 4H⁺ (aq) + 4e^- → 2H₂O (l)

• O₂ (g) + 2H₂O (l) + 4e^- → 4OH^- (aq)

• H₂ (g) → 2H⁺ (aq) + 2e^-

• H₂ (g) + 2OH^- (aq) → 2H₂O (l) + 2e^-

Acidic fuel cells have...

• H⁺ electrolyte

• OH^- electrolyte

oxygen is a strong...

• oxidising agent

• reducing agent

In the image is an acidic hydrogen fuel cell. The half reaction occurring at the identified electrode is...

• O₂ (g) + 4H⁺ (aq) + 4e^- → 2H₂O (l)

• O₂ (g) + 2H₂O (l) + 4e^- → 4OH^- (aq)

• H₂ (g) → 2H⁺ (aq) + 2e^-

• H₂ (g) + 2OH^- (aq) → 2H₂O (l) + 2e^-

In the image is an acidic hydrogen fuel cell. The electrode the arrow is pointing to is the...

• Positive electrode

• Negative electrode

What type of reaction occurs in a fuel cell?

• Exothermic

• Endothermic

What energy conversion occurs in fuel cells.

• Chemical energy → Electrical Energy

• Chemical energy → Thermal energy → Kinetic energy → Electrical Energy

What energy conversion occurs in a combustion engine?

• Chemical energy → Electrical Energy

• Chemical energy → Thermal energy → Kinetic energy → Electrical Energy

What is produced by a hydrogen-oxygen fuel cell?

• Water and Carbon Dioxide

• Carbon Dioxide

• Water