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Chemistry: Electrode Potentials Part 5

Chemistry16 CardsCreated 2 months ago

This deck covers key concepts about fuel cells, including their operation, components, reactions, advantages, and disadvantages.

Fuel cells: what flows into the fuel cell and what flows out

Fuel and oxygen flow into fuel cell and products flow out
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Key Terms

Term
Definition
Fuel cells: what flows into the fuel cell and what flows out
Fuel and oxygen flow into fuel cell and products flow out
Fuel cells: what remains in the cell
The electrolyte
Fuel cells: what can fuel cells operate continuously depending on
Provided the fuel and oxygen are supplied into cell
Fuel cells: do fuel cells have to be recharged
No
The alkaline hydrogen oxygen fuel cell: what are the cells two electrodes made out of
Porous Pt based material
The alkaline hydrogen oxygen fuel cell: what are the two electrodes separated by
A semi permeable membrane

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TermDefinition
Fuel cells: what flows into the fuel cell and what flows out
Fuel and oxygen flow into fuel cell and products flow out
Fuel cells: what remains in the cell
The electrolyte
Fuel cells: what can fuel cells operate continuously depending on
Provided the fuel and oxygen are supplied into cell
Fuel cells: do fuel cells have to be recharged
No
The alkaline hydrogen oxygen fuel cell: what are the cells two electrodes made out of
Porous Pt based material
The alkaline hydrogen oxygen fuel cell: what are the two electrodes separated by
A semi permeable membrane
The alkaline hydrogen oxygen fuel cell: what is the electrolyte
Sodium hydroxide solution
The alkaline hydrogen oxygen fuel cell: which reaction takes place when hydrogen enters at the negative electrode
H2 + 2OH- > 2H2O + 2e-
The alkaline hydrogen oxygen fuel cell: reaction taking place at positive electrode
O2 + 2H2O + 4e- > 4OH-
The alkaline hydrogen oxygen fuel cell: overall equation
2H2 + O2 > 2H2O
Advantages of fuel cells: why are they more efficient
They convert more of their available energy into kinetic energy
Advantages of fuel cells: what is the only waste product
Water
Advantages of fuel cells: why do they not need to be recharged
They produce a continuous supply of energy so long as hydrogen and oxygen are supplied so they do not need to be recharged
Disadvantages of fuel cells: what is the disadvantage relating to hydrogen being produced
Can be done by electrolysis of water but requires electricity- burning fossil fuels
Disadvantages of fuel cells: why must hydrogen be handled carefully when stored and transported
It’s explosive and flammable
Disadvantages of fuel cells: what is there nothing of relating to hydrogen fuel
No infrastructure to provide hydrogen fuel for cars