Sunday 1 May 2011

STATES OF MATERIAL : MAIN PROPERTIES OF LIQUIDS

Unlike solids, liquids do not have specific shapes. However, the shape of a liquid depends on the shape of the container into which it is poured. For example, if we pour water into a glass or a container, it will take the shape of that container. If we pour syrup juice or any other liquid into a bottle or a paper container, it will take the shape of that particular container.

The molecules in a liquid are arranged less tightly and orderly than those in a solid object. However, they are more closely arranged as compared to gas. Particles in a solid object tend to be very tight, close to each other. In liquid, the individual particle is in contact with one another but have little compression. On the other hand, particles in gas have more freedom and are constantly moving. They expand to fill the entire volume of the container and conform to the shape of that particular container.

Liquids and solids maintain a definite volume. A litre of liquid will not expand to fill a two-litre container, as a litre of gas does. Most liquids exist in liquid forms at the right temperature and pressure. Water exists as a liquid at room temperature of 20°C (68°F) and at normal atmospheric pressure. Some other liquids do exist in the same temperature and pressure.

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