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Ostwald process
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====Side reactions==== A number of side reactions compete with the formation of nitric oxide. Some reactions convert the ammonia to N<sub>2</sub>, such as: :{{chem2|4NH3 + 6NO -> 5N2 + 6H2O}} This is a secondary reaction that is minimised by reducing the time the gas mixtures are in contact with the catalyst.<ref>{{cite book | title = Inorganic Colloid Chemistry -: The Colloidal Elements | author = Harry Boyer Weiser | publisher = Read Books | year = 2007 | isbn = 978-1-4067-1303-9 | page = 254 }}</ref> Another side reaction produces [[nitrous oxide]]: :{{chem2|4NH3 + 4O2 -> 2N2O + 6H2O}} (Ξ''H'' = β1105 kJ/mol)
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