Problem 17
Chemically speaking, what is biodiesel and how is it produced?
Problem 18
Describe the three ways in which hydrogen can be stored in vehicles for use as a fuel, and discuss briefly the disadvantages of each method.
Problem 19
Does the burning of hydrogen really produce no pollutants? Under what conditions do no pollutants form?
Problem 21
Describe how a hydrogen fuel cell works, and write balanced half-reactions for its operation in acidic media. What other types of fuel cells exist?
Problem 22
Describe the production of hydrogen gas by electrolysis. Can solar energy be used for this purpose? Why isn't water decomposed directly by absorption of sunlight?
