Batteries Flashcards
What does the voltage of a cell depend on?
The difference in reactivity of the two electrodes
Chemical cells produce a voltage. When do they stop producing a voltage and go flat’?
When one of the reactants has run out
What is the only chemical product when hydrogen and oxygen are reacted together in a fuel cell?
Water
Which is not an advantage for using a hydrogen-oxygen fuel cell in a space station?
They generate useful heat for warmth
Hydrogen can be used as a fuel for cars. Which of the following is an advantage of using hydrogen instead of petrol?
Exhaust gases contain only water
Which of the following is a disadvantage of using hydrogen as a fuel?
fossil fuels are use for electrolysis, they are limited
How do you boost the amount of electricity a fuel cell system produces?
Adding cells
Which substance donates electrons?
Hydroxide ions
The more reactive metal in a chemical cell forms at the positive electrode
False
Which of the following is one way to produce hydrogen?
Electrolysis
Which substance accepts electrons?
Water
In hydrogen fuel cells, at which electrode are electrons released?
Negative electrode
How do you refuel a hydrogen fuel cell electric vehicle?
Pump hydrogen gas directly into the tank
In addition to a fuel, what other chemical is needed by a fuel cell?
Oxygen
In the space station, why can you not rely on solar cells all the time?
They only lroduce electricity when the Sun is visible
