EVPP 108 Lecture Notes - Lecture 6: Sodium Chloride, Osmosis, Tidal Power
23 Aug 2016
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Document Summary
Water is found in glaciers, ice caps, lakes, streams, soils, underground reservoirs and in the bodies of all living organisms. We use water in home, industry, agriculture etc. These use differ with respect to quality and quantity of the water. We use all available sources inland water, groundwater, ocean water. We pollute it, purify it, reuse it over and over again. H2o molecules are bonded to each other through h-bonding. The strong h-bonding between the water molecules result in association of molecules and thus molecular weight and hence melting point, increases. This keeps ice in the solid state up to 0 c. When crystal structure of ice breaks, the liberated molecules become associated with each other so strongly that they pack together more closely than in ice crystal itself. As a consequence, ice becomes less dense than water and floats on it.
