chemical cells and fuel cells Flashcards
(9 cards)
What do cells contain that reacts to produce electricity?
Chemicals
What is a simple cell made of?
2 different metals in contact with an electrolyte
How are batteries formed?
By connecting 2 or more cells in series to produce a greater voltage
What happens in non-rechargeable cells when one of the reactants is used up?
The chemical reaction stops
What allows rechargeable cells to be recharged?
The chemical reactions are reversed when an external electrical current is supplied
What do fuel cells require as an external source?
Fuel (e.g., hydrogen) and oxygen or air
What happens to the fuel in a fuel cell?
It is oxidised electrochemically to produce a potential difference
What is the overall reaction in a hydrogen fuel cell?
The oxidation of hydrogen to produce water
What advantage do hydrogen fuel cells offer over rechargeable cells and batteries?
They offer a potential advantage
