Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
Fuel cells convert the chemical energy in a fuel and oxygen into:
Infrared radiation
Electricity
Sound
|
Which direction do the electrons flow in a hydrogen-oxygen fuel cell?
From the cathode to the anode
From the anode to the cathode
|
What is the overall reaction for a hydrogen oxygen fuel cell?
water ➔ hydrogen + oxygen
hydrogen + oxygen ➔ water
hydrogen + oxygen ➔ water + carbon dioxide
|
What is an electrolyte?
Electrically charged water
A solution of electrons
A solution through which ions can flow
|
positive / negative
In fuel cells the anode (which is drawn on the left) is , while the cathode (drawn on the right) is .
This is the opposite way around to the anode and cathode in electrolysis, so be careful not to mix them up.
|
What are the electrodes in fuel cells made from?
Porous carbon
Inert plastic
Reaction metal
|
The oxygen enters the cathode compartment and the hydrogen enters the anode compartment.
False
True
|
When hydrogen gas enters a fuel cell, it loses electrons to become hydrogen ions. Is the hydrogen gas oxidised or reduced?
Reduced
Oxidised
|
What are the main advantages of hydrogen-oxygen fuel cells?
(Select all that apply)
Hydrogen and oxygen are both renewable
Fuel cells last longer than batteries
The hydrogen fuel exists as a gas at room temperature
It requires energy to produce the hydrogen
The reaction doesn't produce any pollutants
|
What are the main disadvantages of hydrogen-oxygen fuel cells?
(Select all that apply)
Hydrogen gas requires a large space to store
It requires energy to produce hydrogen
Hydrogen is highly flammable, so danger to store
Hydrogen and oxygen are both renewable
Fuel cells are simpler then combustion engines
|