Question

139. In an experiment, the combustion or
7.5 kg of a fuel produces 60,000 KJ of
heat. If the combustion is complete then
the calorific value of the fuel is -
(A) 8000 KJ
80
230
60000 200
(B) 8000 KJ per kg
(©) 8000 square KJ
(D) 10,000 KJ​

Answer 1

answer : option (B) 8000 Kj/kg

explanation : it is given that,

mass of fuel = 7.5kg

total heat produced after completely combustion of given fuel = 60,000KJ

we know, Calorific Value of fuel is the amount of heat energy produced on complete combustion of 1kg of fuel.

so, Calorific value of fuel = heat produced/mass of fuel

= 60,000/7.5 KJ/Kg

= 8000 KJ/Kg

hence, option (B) 8000 KJ/kg is correct choice.