Question

why are gaseous fuels favored over solid fuels?

and

Most fuels are made of ________ and __________.

Answer 1

Gaseous fuels are favoured over solid fuels because:

1) Gaseous fuels have high calorific value, with high methane content.
For eg. Coal gas has calorific value 7600 kCal/kg
2) They can be conveyed easily through pipelines to the actual place of need, thereby eliminating manual labour in transportation.
3) They are clean in use
4) They have high efficiency of heat and power generation.
5) They burn without any soot , smoke and ashes.
6) No ash, no SO₂ emission takes place.
7) They are free from impurities found in solid and liquid fuels.
8) Also they can be lighted at ease.