Question

Some hydrogen fuel cell vehicles fill up at a gas station that uses hydrolysis to produce the hydrogen gas. When hydrogen is combined with oxygen in the fuel cell, energy is released to power the car. The reaction is like hydrolysis in reverse
2H2O (liq.) + energy ← 2H2 (gas) + O2 (gas)

Pick all statements which are true.

Select one or more:

a.

hydrogen is storing a fraction of the energy from the source of the electricity, which could be solar, nuclear, coal, gas, hydro etc.

b.

using hydrogen made by electrolysis is more efficient and cleaner than using the fuel or electricity needed for electrolysis directly..

c.

More energy is put into electrolyzing water to get hydrogen than can be recovered from the fuel cell due to the less than perfect efficiency of both processes.

d.

hydrogen fuel cells can produce more energy than is used to create the hydrogen by electrolysis

Answer 1

The correct statements are:-

a.) Hydrogen is storing a fraction of the energy from the source of the electricity, which could be solar, nuclear, coal, gas, hydro etc.

b.) Using hydrogen made by electrolysis is more efficient and cleaner than using the fuel or electricity needed for electrolysis directly..

c.) More energy is put into electrolyzing water to get hydrogen than can be recovered from the fuel cell due to the less than perfect efficiency of both processes.