Combustion Of Alkanes And Combustion

Question 1

Complete combustion equation. Example: nonane

Answer 1

C9H20 + 14O2 —> 9CO2 + 10H20

Question 2

Incomplete combustion equation. Solid or gas

Answer 2

Carbon monoxide is always the gaseous product, carbon is always the product.
C12H26 + 12.5O2 —-> 12CO + 13H20
C4H8 + 2O2 —-> 4C + 4H20

Question 3

Production of sulphur dioxide

Answer 3

S + O2 —> SO2

Question 4

Production of acid rain

Answer 4

SO2 + 0.5O2 + H20 —-> H2SO4

Question 5

Production of nitrogen oxides

Answer 5

2NO + O2 —-> 2NO2
In high temperatures, nitrogen reacts with the oxygen.

Question 6

Nitrogen dioxide acid rain

Answer 6

4NO2 + 2H20 + O2 ——> 4HNO3

Question 7

Methods to reduce pollution

Answer 7

CaO + 2H20 + SO2 + 0.5O —> CaSO4 + 2H20- calcium oxide and water- flue gas desulphurisation
CaCO3 + 0.5O2 is an alternate reaction with calcium carbonate

Question 8

Catalytic converters

Answer 8

Honeycomb structure made of platinum and rhodium metals.
Removal of NO and CO: 2NO + 2CO—> N2 + 2CO2
Removal of unburnt hydrocarbon: C8H18 + 25NO —> 8CO2 + 9H20 +12.5N2