why does a piece of ice float on water ?
Answers
Q.why does a piece of ice float on water ?
Ice floats on water because it is less dense than water.
When water freezes into its solid form, its molecules are able to form more stable hydrogen bonds locking them into positions. Because the molecules are not moving, they're not able to form as many hydrogen bonds with other water molecules. This leads to ice water molecules not being as close together as in the case of liquid water, thus reducing its density.
Most substances in their solid form are more dense than their liquid forms. The opposite is true in water. This property of water is somewhat unusual and rare.
Water is actually most dense at 4ºC. At any temperature below or above 4ºC, water becomes less dense.
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◼️An unusual property of ice frozen at a pressure of one atmosphere is that the solid is some 8% less dense than liquid water.
◼️Water is the only known non-metallic substance to expand when it freezes. Ice has a density of 0.9167 g/cm³ at 0 °C, whereas water has a density of 0.9998 g/cm³ at the same temperature.
◼️Liquid water is most dense, essentially 1.00 g/cm³, at 4 °C and becomes less dense as the water molecules begin to form the hexagonal crystals of ice as the temperature drops to 0 °C.
◼️This is due to hydrogen bonds forming between the water molecules, which line up molecules less efficiently (in terms of volume) when water is frozen.
◼️The result of this is that ice floats on liquid water.