Question

Calculate the calorific value of a fuel 'X' if its 7.5 kg gives 412500 kJ of heat.​

Answer 1

Answer:

The calorific value of fuel is the amount of heat produced by the complete combustion of 1 kg of fuel.

Heat produced by 4.5 kg of fuel =180000 kJ.

Heat produced by 1 kg fuel =

4.5

180000

=40000 kJ/kg.

Hence, the calorific value of the fuel is 40,000 kJ/kg.

Answer 2

Given,

Burning of 7.5 Kg of a fuel X gives heat of amount = 412500 kJ

To find,

The calorific value of the fuel X.

Solution,

We can simply solve this numerical problem by using the following process:

Theoretically,

The calorific value of any fuel refers to the amount of heat produced by the combustion of unit weight, that is 1 Kg of the fuel.

Now, according to the question,

Burning of 7.5 Kg of a fuel X gives heat of amount = 412500 kJ

=> Burning of 1 Kg of a fuel X gives heat of amount = (412500 kJ)/(7.5 Kg) = 55,000 kJ

{By applying unitary method}

=> The calorific value of the fuel X = 55,000 kJ

Hence, the calorific value of fuel X is equal to 55,000 kJ.