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The heat energy obtained on burning 2 kg of hydrogen, coal and petrol are given below:Petrol – 9 × 107 J Hydrogen – 3 × 108 J Coal – 6 × 107 Ja. Which of these is the most efficient fuel? b. How much is the calorific value of hydrogen? c. Arrange these fuels in the ascending order of their calorific values. d. Which of the above will you select as a good fuel? What is the basis of your selection? |
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Answer» a. Hydrogen b. 150000 kj/kg c. Coal, petrol, hydrogen. d. Petrol. Easy to handle: less atmospheric pollution, Calorific value is high. |
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