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The Properties of Water.

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The Properties of Water Water is arguably the most important biochemical, in one way or another it is intricately involved in just about every process on this planet. It has many properties but only the following will be covered at the moment. Some of the obvious properties is that it's a colourless, tasteless and transparent liquid but some of the chemical properties are listed below. 1. Water is a polar molecule. Water's unique properties are largely a result of its simple composition and structure. Water is composed of two hydrogen atoms and one oxygen atom. As shown in the diagram, the two hydrogen atoms are smaller and they rest on both sides of the larger oxygen atom. When the hydrogen atoms combine with oxygen, they each share their single electron and form what is known as a covalent bond. Because electrons are more attracted to the positively charged oxygen atom, the hydrogen's become slightly positively charged and the oxygen atom becomes negatively charged. This separation between negative and positive charges creates what is known as a polar molecule, meaning a molecule that has an electrical charge. ...read more.


Seawater with its dissolved minerals tends to be slightly basis, around 8 or so. 5. Water has a high latent heat of fusion. To increase the temperature of water, energy in the form of heat must be added. This heat-energy is measured in calories. One calorie is the amount of heat needed to raise the temperature of 1 gram of water by 1 degree. Thus, to raise the temperature of 1 gram of water from 0 degrees to 100 degrees would require 100 calories of heat. However, to change 1 gram of water from a liquid to a gas requires 540 calories. No change in temperature occurs; there is only a change in the physical state of the water as it turns from a liquid to a gas. The heat needed to change water from a liquid to a gas is called the latent heat of vaporisation. Water's exceptionally high latent heat of vaporization is what makes water so hard to boil. As we all know, vaporisation of water occurs at other temperatures as well. ...read more.


Its ability to absorb heat at one location and transport it to another locations is extremely important in moderating the climate of our globe. On a smaller scale, anyone who has lived near the beach has probably noticed that days are not as hot during summer and nights are not as cold during winter. This is because of the high heat capacity of water and its ability to absorb to release tremendous amounts of heat without changing temperature. 7. Water has a high surface tension. The ability of water molecules to quickly break and re-form hydrogen bonds gives it a property called cohesion. Water's high amount of cohesion makes it such that a kind of "water barrier" is set up that allows things to float easier on the surface and causes water to form beads. An example of this is some insects can skate across the surface of the water. They can do this because water has a high surface tension. 8. Water is essential to all living organisms. Water is major component of cells forming between 70 and 95% of the mass; human beings are about 60% water. Water also provides an environment for all the organisms that lie in the water; three quarters of the planets surface is covered in water. ...read more.

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