Полнотекстовый поиск:
Где искать:
только в названии
только в тексте
слова в тексте
только заголовок

Рекомендуем ознакомиться

Остальные работы->Реферат
As we age and hear different myths and stories about sex, it becomes an interesting topic of conversation. Some have had personal experience with this...полностью>>
Остальные работы->Реферат
By conveying his imagination by using language, the vocabulary used by coleridge is of great importance. The five lines of the poem Kubla Khan sound l...полностью>>
Остальные работы->Реферат
It is placed in series between your house and the provided electricity. Any current in excess of the rated current amount will trip the circuit breake...полностью>>
Остальные работы->Реферат
The rest of the world, now that the Cold War is over, is resuming its long-simmering ethnic rivalries. Nations from the former Soviet Union to Yugosla...полностью>>

Главная > Реферат >Остальные работы

Сохрани ссылку в одной из сетей:

Properties Of Water Essay, Research Paper

What properties of water make it a unique material and an essential component of living matter?

Water is so common that it is easy to overlook the fact that it is an exceptional substance with many amazing qualities. With its properties, we can trace water s unique behavior to the structure and interactions of its molecules. Water is constructed of two hydrogen (H) and one oxygen (O). The hydrogen become + charged and the oxygen maintains a charge when they combine to form water. This is a single covalent bond. A covalent bond is the sharing of a pair of valence electrons by two atoms. The attraction is electrical; a slightly positive hydrogen of one molecule is attracted to the slightly negative oxygen of a nearby molecule. The two molecules are then held together by a hydrogen bonds. The hydrogen bonds hold the substance together, and this is called cohesion. Cohesion due to hydrogen bonding contributes to the transport of water against gravity in plants. Water reaches the leaves through vessels in the roots. Adhesion, the clinging of one substance to another, also helps. The water in the walls of the vessels helps counter the downward pull of gravity. This makes other substances extremely soluble in it, allowing important chemical reactions of metabolism and digestion to occur. Almost every chemical reaction that occurs in the body depends on water.

Water stabilizes air temperatures by absorbing heat from air that is warmer and releases stored heat to air that is cooler. An example of this would be an ice cube that is cooling a drink-it is adding coldness to the drink, but by absorbing heat as the ice melts. Hydrogen bonding gives water a high specific heat. Evaporative cooling is based on water s high heat of vaporization. Ice is less dense than liquid water because its more organized hydrogen bonding causes expansion into a crystal formation. Floating ice allows life to exist under the frozen surfaces of lakes and polar seas. Water is also a solvent because its polarity attracts it to charged and polar substances. When water molecules surround ions or polar substances, they dissolve and are called solutes. Hydrophilic substances have an affinity for water. Hydrophobic substances do not. One of its most important properties is its ability to dissolve many other substances. The versatility of water as a solvent is essential to living organisms. Water has many properties that make it a unique material and an essential component of living matter.

Загрузить файл

Похожие страницы:

  1. Properties Of Water Essay Research Paper Properties

    Реферат >> Остальные работы
    Properties Of Water Essay, Research Paper Properties of Water Water is essential for life as ... would be impossible without the use of water. The origin of all life can ... consumption. The properties of water give it the ability to react with different elements ...
  2. Psychological Properties Of Yawning Essay Research Paper

    Реферат >> Остальные работы
    ... Properties Of Yawning Essay, Research Paper Beyond Boredom: Studies on the physical and psychological properties of ... reasonable to question whether the testing methods of this experiment may ... In addition, they kept track of what time they awoke and went ...
  3. Hardness Of Water Essay Research Paper Water

    Реферат >> Остальные работы
    ... Of Water Essay, Research Paper Water is the most important molecule that exists on the Earth. Without water ... immeasurable number of things. There are many properties of water, which makes ... Table 4 Source of Water pH of Water pH of Water with Resin Beads Tap ...
  4. White Lilacs Essay Research Paper White Lilacsby

    Реферат >> Остальные работы
    White Lilacs Essay, Research Paper White Lilacs by Carolyn Meyer I ... Frith. In WHITE LILACS the main conflict is weither the black ... rig it so that only property owners can vote. this ... town buys the properties of Freedom at a fraction of their worth, and ...
  5. The Exiting World Of Water Essay Research

    Реферат >> Остальные работы
    The Exiting World Of Water Essay, Research Paper Properties Water(h 2 0)is a liquid at room temperature, ... . Water combines with certain salts to form hydrates. Water also reacts with metal ... In aeration, or the saturation of water with air in such a manner as ...

Хочу больше похожих работ...

Generated in 0.0018060207366943