Hydrogen fuel cells

A fuel cell converts facilitates the conversion between which two types of energy?

• chemical to electrical

• chemical to heat

• electrical to chemical

• heat to electrical

In a fuel cell, oxidation occurs at the anode.

• true

• false

What is the oxidation half equation for a hydrogen fuel cell operating under acidic conditions?

• H₂(g) → 2H⁺(aq) + 2e^-

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

• O₂(g) +2H₂O (l) + 4e^- → 4OH^-(aq)

• O₂(g) +4H⁺(aq) + 4e^- → 2H₂O (g)

What is the oxidation half equation for a hydrogen fuel cell operating under alkaline conditions?

• H₂(g) → 2H⁺(aq) + 2e^-

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

• O₂(g) +2H₂O (l) + 4e^- → 4OH^-(aq)

• O₂(g) +4H⁺(aq) + 4e^- → 2H₂O (l)

What is the reduction half equation for a hydrogen fuel cell operating under acidic conditions?

• H₂(g) → 2H⁺(aq) + 2e^-

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

• O₂(g) +2H₂O (l) + 4e^- → 4OH^-(aq)

• O₂(g) +4H⁺(aq) + 4e^- → 2H₂O (g)

What is the reduction half equation for a hydrogen fuel cell operating under alkaline conditions?

• H₂(g) → 2H⁺(aq) + 2e^-

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

• O₂(g) +2H₂O (l) + 4e^- → 4OH^-(aq)

• O₂(g) +4H⁺(aq) + 4e^- → 2H₂O (g)

What is the by product of the hydrogen fuel cell?

• hydrogen gas

• carbon dioxide

• acid or base solution (depending on the electrolyte used)

• water

If the hydrogen fuel cell was operating under alkaline conditions, what electrolyte could be used?

• NaCl

• HCl

• KOH

• H₃PO₄

What is fed into the cathode compartment of the hydrogen fuel cell?

• Hydrogen gas

• Oxygen gas

• Water

• Electrolyte

What is fed into the anode compartment of the hydrogen fuel cell?

• Hydrogen gas

• Oxygen gas

• Water

• Electrolyte