Water and It's Pollution

n. Physical properties-the result of henry spliceing

Studied in isolation, the irrigate mote is deceptively simple. Its tow atomic number 1 atoms atomic number 18 joined to the type O atom by single covalent bonds. Because oxygen is more(prenominal) electro detrimental than hydrogen, the electrons of the pivotal bonds spend more time nigher to the oxygen atom. In other words, the bonds that hold together the atoms in a water molecule atomic number 18 polar covalent bonds, with the oxygen region of the molecule having a partial negative charge and the hydrogen having a partial positive charge. The water molecule, shaped something like a wide V, is a polar molecule, meaning that opposite ends of the molecule have opposite charges.

The erroneous properties of water arise from attractions between these polar molecules. The attraction is electric; meagerly positive hydrogen of one molecule is attracted to the slightly negative oxygen of a nearby molecule. The two molecules are thus held together by a hydrogen bond (FIGURE 1). Each water molecule can form hydrogen bonds to maximum f four neighbors, and at any tending(p) moment, many of the molecules in a sample of liquid water are linked in this way. The extraordinary qualities of water are emergent properties resulting from the hydrogen bonding that orders molecules into a higher level of structural organization.

I will examine four of water properties that digest to the fitness of Earth as an environment for life: irrigate cohesive behavior, its ability to stabilize temperature, its expansion upon freezing, and its versatility as a solvent.

1. Cohesion

Water molecules stick to each other as result of hydrogen bonding. When water is in its liquid form, its hydrogen bonds are real fragile, about 1/12 as strong as covalent bond. They form, break, and re-form with great frequency. Each hydrogen bond lasts solitary(prenominal) a few trillionths of...

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