1.

(a) What are the advantages of dihydrogen as a fuel? (b) What are the disadvantages of using dihydrogen as a fuel? (c) What is meant by the term ‘hydrogen economy’?

Answer»

(a) 1. It is abundantly available in the combined state as water. 

2. Use of dihydrogen as fuel provides pollution free atmosphere because its combustion product is only water. 

3. Heat of combustion per gram of dihydrogen is more than twice that of jet fuel. 

(b) 1. Dihydrogen does not occur in free state in nature. 

2. Hydrogen gas has explosive flammability which causes problem to its storage and transportation. 

3. A cylinder of compressed dihydrogen weighs about 30 times as much as a tank of petrol containing the same amount of energy.

(c) Hydrogen economy refers to the use of dihydrogen as an alternative source of energy. The basic principle of hydrogen economy is storage and transportation of energy in the form of dihydrogen instead of fossil fuels or electric power.



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