In general a good source of energy would be one,
(i) which would do a large amount of work per unit mass or volume
(ii) which would be easily accessible.
(iii) which can be easily stored and transported.
(iv) which is also reasonably economical.
If you could use any source of energy for heating your food, which one would you use and why?
What are the disadvantages of fossil fuels?
What is a good fuel?
The characteristics of a good fuel are:
(i) It should be farily cheap.
(ii) It should be easily available.
(iii) Its ignition temperature should be well above normal temperature.
(iv) It should be conveniently handled and transported.
(v) It should not produce, during burning, any poisonous materials or irritating fumes.
(vi) Its combustion rate should be steady and controllable.
(vii) It should not leave any residue or ash after burning.
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