What is the average energy density of hydrogen compared to petrol?

Energy density is two times to that of petrol

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Energy density is ten times to that of petrol

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Energy density is three times to that of petrol

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Energy density is exactly same as petrol

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Solution

The correct option is C
Energy density is three times to that of petrol

The average energy density of hydrogen compared to petrol is almost three times.

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The heat energy obtained on burning 2 kg of hydrogen, coal, and petrol are given below:

Hydrogen- $3 \times 10^{8}$ J

Coal- $6 \times 10^{7}$ J

Petrol- $9 \times 10^{7}$ J

Arrange these fuels in the ascending order of their calorific values.

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