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An ice cube at 0^(@)C is placed in some liquid water at 0^(@)C, the ice cube sinks - Why? |
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Answer» Solution :(i) In an ice CUBE, each atom is SURROUNDED tetrahedrally by four water molecules through hydrogen bond and its density is low. (ii) Liquid water at `0^(@)C` has the density as 999.82 `kg//cm^(3)`. Maximum desnity is attained by water only at `4^(@)C` as 1000 `kg//cm^(3)`. (iii) When the temperature changed from `4^(@)C " to " 0^(@)C`, the density of water decreases rather than increases. This is CALLED anomalous expansion of water. (IV) The reason for this phenomenon lies in the structure of ice lattice and hydrogen bonding in water. (v) At `0^(@)C`, ice cube sinks in liquid water at `0^(@)C` because of the lesser desnity and greater volume of water. |
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