Question

which substances are burn to preduce a large amount of heat energy​

Answer 1

Any substance which is easily available and burns in air at a moderate rate, producing a large amount of heat energy, without leaving behind any undesirable residue is called fuel. Example: wood, charcoal, petrol, kerosene, etc.

Answer 2

Answer:

Any substance which is easily available and burns in air at a moderate rate, producing a large amount of heat energy, without leaving behind any undesirable residue is called fuel. Example: wood, charcoal, petrol, kerosene, etc