10:44 AM
M V Rao
A pure susbstance is defined as one that is homogeneous and invariable in chemical composition throughout its mass . The relative proportions of the chemical components are also constant in the chemical composition. Examples: atmospheric air, water-steam mixture and combustion products of a fuel etc. But the mixture of air and liquified air is not a pure substance as the relative proportions of Oxygen and Nitrogen differ in gaseous and liquid phases. The state of a pure substance of a given mass can be fixed by specifying two independent intensive properties, provided the system is in equilibrium. This is known as two-property rule.
Posted in: 
0 comments:
Post a Comment