chapter 6 - fuel cells

Question 1

fuel cells

Answer 1

• reactants supplied continuously
• O is oxidising agent (reduced at cathode)
• fuel is reducing agent ( oxidised at anode)
• anions move towards anode
• cations move towards cathode

Question 2

equations of fuel cells

Answer 2

overall equation is the combustion equation
electrolyte present in half equation
not present in overall equation

Question 3

advantages

Answer 3

• more efficient
• water as byproduct
• no need to recharge (as long as fuel is available)
• variety of fuels
• quiet

Question 4

disadvantages

Answer 4

• expensive
• require constant fuel
• difficult to produce, store and distribute H2
• larg e
• generate DC not AC