Question

Calorific value of coal is 30,000kj/kg. Explain the statement

Answer 1

Answer:

It means that 1 kg of coal produces 30000 kilo joule of heat on heating.

1 kilo joule = 1000 joule

So 1 kg of coal produces 30000000 joules of heat .

Answer 2

Answer:

Calorific value :

the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram.

Calorific value of coal is 30,000 kj/kg :

This statement means that amount of energy given out on burning  30,000 units of coal in the presence of fully required amount of oxygen for its burning.

PLZZ MARK AS BRAINLIEST . THANKS .