Hydrogen–oxygen fuel cells：練習問題

What is the only chemical product formed when a hydrogen–oxygen fuel cell is used to produce electricity?

A Carbon dioxide
B Nitrogen
C Water
D Carbon monoxide <\/p>

Which of the following is a major disadvantage of using hydrogen–oxygen fuel cells for transport? <\/p>

Which atmospheric pollutant produced by gasoline engines is eliminated at the point of use by switching to hydrogen–oxygen fuel cells? <\/p>

Which two substances are used as fuels in a hydrogen–oxygen fuel cell to generate an electric current? <\/p>

What is a primary advantage of using a hydrogen–oxygen fuel cell in a vehicle instead of a gasoline engine? <\/p>

State the only chemical product formed in a hydrogen–oxygen fuel cell.

Identify one disadvantage related to the storage of fuel for hydrogen–oxygen fuel cell vehicles.

In an alkaline hydrogen–oxygen fuel cell, hydrogen reacts at the anode and oxygen reacts at the cathode.
(a) Construct the ionic half-equation for the oxidation reaction occurring at the anode using hydroxide ions (\( \text{OH}^- \)).
(b) Construct the ionic half-equation for the reduction reaction occurring at the cathode.
(c) Explain why the anode is the negative electrode in this cell.

A hydrogen–oxygen fuel cell is an alternative to traditional combustion engines.
(a) State the names of the two reactants used in this fuel cell to produce electricity.
(b) Name the only chemical product of the reaction.
(c) Write the overall chemical equation for the reaction occurring in the fuel cell.

Hydrogen–oxygen fuel cells are often compared to gasoline/petrol engines for use in vehicles.
(a) State two advantages of using a fuel cell instead of a gasoline engine.
(b) State one disadvantage of using hydrogen as a fuel for vehicles.