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Give physical and chemical properties of dinitrogen. |
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Answer» Solution :Physical PROPERTIES : Dinitrogen is colourless, odourless, tasteless and non-toxic gas. NITROGEN atom has two stable isotopes : `""^(14)N`and `""^(15)N` Water solubility is very low (23.2 `cm^(3)` PER litre of water at 273 K and 1 bar pressure) and low freezing and boiling points. Chemical properties : It is inert at room temperature because of high `overset(..)N -= overset(..)N` enthalpy reactivity increases with rise in temperature. At high temperatures, it directiy combines with some metals to form predominantely ionic nitrides and with non-metals to form covalent nitrides. For example: `6Li + N_(2) overset(Delta) to 2Li_(3)N` `3MG + N_(2) overset(Delta) to Mg_(3)N_(2)` It combines with hydrogen at about 773 K in the presence of catalyst to form ammonia. `N_(2)(g) + 3H_(2)(g) overset(773 K) `N_(2)(g) + O_(2)(g) overset(Delta)to 2NO(g)` |
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