Question

what is fuel ? what are their characteristics​

Answer 1

Answer:

Fuels are any material that store potential energy in forms, which upon burning in oxygen liberates heat energy. Calorific value of fuel is the total quantity of heat liberated when a unit mass or volume of fuel is completely burnt.

Explanation:

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Answer 2

Answer:

a fuel is a material that can be made to react with other substances so that it release energy as a heat energy or used in different works .

the characteristics of fuels are as follows-

1. high calorific value

2. moderate ignition temperature

3. low moisture contain

4.low cost

5. easy to transport

6. product of combustion not harmful

7. moderate velocity of combustion.