Occur as free
N2 molecules in the atmosphere (Approximately 78% by volume)
molecule is very unreactive. (triple covalent bond)
the form of proteins in all living organisms.
Nitrogen is used as coolant
The electric discharge in lightning provides sufficient energy to break the N ≡ N triple bond and then react with Oxygen gas.
temperatures in car engines, Nitrogen and oxygen react to form NO(gas) which
released into air with exhausted gas
NO(Nitrogen monoxide) formed will be oxidized to NO2(Nitrogen di oxide)
NO + O2 –> NO2
Other than NO
and NO2 , N2 can form other oxides example. NO2 molecules (brown).
One of the
most fundamental raw materials for modern industries
source of fertilizers and 85% of ammonia is used to make nitrogenous fertilizers
(e.g. (NH4)2SO4, NH4NO3)
and plastics (rayon, nylon)
nitric(V) acid (used to make fertilizers, dyes)
manufactured by the combination of N2 gas and H2 gas under suitable conditions
of temperature and pressure(Compromise conditions)
+ 3H2 –>2NH3
conditions- This reaction is reversible and exothermic. By increasing
temperature the backward reaction will be preferred. By reducing temperature
the rate of reaction is decreased.
maintain a suitable rate of production a compromise temperature 450 C is maintained.
Maintaining rate high pressure is needed which is costly.