Question

7 kg of fuel is completly burnt to give off 1.665×10^8 joules of energy.The caloriffic value of the fuel in standard unit is

Answer 1

Answer:

The answer is  23785 KJ/ Kg.

Explanation:

The definition of calorific value is "the amount of heat energy produced when 1kg of fuel is completely burnt".It is calculated by diving heat energy by the mass of the fuel used. The SI unit of calorific value is J/ Kg or KJ /Kg.

The calorific value of fuel = Heat generated / Mass of fuel used.

Given data:

Amount of fuel = 7 kg

Heat energy produced = 1.665×10^8 joules  

Solution:

Calorific value = 1.665×10^8 joules / 7 kg

                      = 23785714.28 J/kg

                      =  23785 KJ/ Kg