Question 11
In an experiment, 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel.

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Solution

The calorific value of fuel is the amountofheat produced by the complete combustion of 1 kg of fuel.
Now,
Heat produced by 4.5 kg of fuel = 180000 kJ Therefore, heat produced by 1 kg of fuel = $\frac{180000}{4.5} = 40000 \frac{k J}{k g}$
Hence, the calorific value of the fuel is $40, 000 \frac{k J}{k g} .$

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