Have you ever seen ice at ice tea? ice is water cooled? why ice not sink?usually solid matter have density greater than liquid matter. why it's gone? Water is a chemical compound. The compound can be interpreted as a combination of several chemical elements (atoms). The chemical formula of water is H2O, which means a combination of 2 hydrogen atoms (H) and one Oxygen atom (O). The combination of 2 or more atoms called molecules. H2O can we refer to as a water molecule. Water molecules are dipoles (has 2 poles), which are negatively charged at the oxygen atom, and positive on the hydrogen atom. So interwoven bonds between water molecules, known as Covalent bond. Beside covalent bond water also have Hydrogen bond, that is a bond between hydrogen with another element that have large electronegative difference, such as oxygen, nitrogen and fluorine.
Water has unique properties compared with other substances, other objects generally have the kind of (Rho) are great in solid form, but not with water. At 4 ° C water has the greatest density, in liquid form. When the temperature is lowered the re-shrink type, this phenomenon known as anomalous properties of water.
The secret of true anomaly of water is closely related to the continuity of living things in the hemisphere who have winters really. Anomaly has been made smaller specific gravity than water ice because ice volume is greater. Heavy water is still liquid is equal to the ice that has been frozen. The change from liquid to solid form (frozen) are not going to change the weight of these substances, however, that changes its volume increases. Because the volume of ice is greater then the density becomes smaller than water. This is why ice floats in water.
Water will begin to freeze if the molecule no longer have enough energy to escape from the bonds of hydrogen atoms (H). At 0 ° C begin to form strong bonds, in which each atom of Oxygen (O) is tetrahedrons surrounded by 4 atoms of Hydrogen (H). Which at first was not water tight molecular bond, which eventually became a crystal-perforated holes (cluster). As a result of water in solid phase (ice), this takes the form of a large volume. Increased volume of up to 10%, the species also decreased by 10% (become lighter).
Imagine if the water was not given the nature of the anomaly by the Lord so that its volume continues to shrink when cooled. What happened? The ice will sink into the water. Ice floating on water is the key course of life in the winter. The lake and the ocean turned to ice in winter, but it is only on the surface only, with no ice thickness of more than two meters. Ice in surface temperature and not be inhibited introduction of good hot or cold so the ice would be a protector of life under the lake from the air temperature is very cold. Even though the air temperature is at minus 50 ° C, below the lake water will not freeze because the ice on unprotected surfaces, and life in it was still ongoing because the temperature is not less than 0 ° C. What a great and glorious blessings.
Subhanalloh...Allohhuakbar....
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