4.15 explain how the combustion of some impurities in hydrocarbon fuels results in the formation of sulfur dioxide

Fuels are derived from crude oil.
- Although these fuels are hydrocarbons, they include impurities such as sulfur.
- When the fuels are burned, sulfur dioxide is produced which can escape into the atmosphere.
S (s)         +         O₂ (g)         →         SO₂ (g)