The calorific values of petrol and CNG are 45000 kJ/kg and 50,000 kJ/kg, respectively. If you have a vehicle which can run on petrol as well as CNG, which fuel will you prefer and why?
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Solution
The calorific values of petrol and CNG:
We will prefer CNG to run the vehicle.
The calorific value of CNG is higher than petrol.
Therefore, CNG will be more economical.
At the same time, it produces the least air pollutants.
Thus, it causes less pollution than petrol.
The calorific value of compressed natural gas is higher than petrol.