Blog Tag Thermal expansion

Thermal expansion

Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, the kinetic energy of its molecules increases. When a substance (solid, liquid or gas) is heated , . . .

Thermal Expansion in Solid

A solid has a definite shape. When a solid is heated, it expands in all the directions, hence the length, area and volume all increase on a heating a solid.The increase in length of a solid is called the linear expansion. The increase in area is called the superficial expansion and the increase in volume is called the cubical expansion . . .

Applications of Thermal Expansion in daily life

The telephone and the electric wires when are connected in summer between the two poles, they are kept loose so that they may not break when they contact in winter. on the other hand , if the wires are connected in winter between the two poles, they are kept tight because they will expand in summer and will sag. The wooden wheels of a bullock-cart . . .

Thermal Expansion in Liquid

Like solid, liquid also usually expands liquid on heating. Liquids expand much more than the solid when heated. Liquids do not have a definite shape, but they have a definite volume, therefore liquids have only the cubical expansion.     . . .

Thermal Expansion in Gases

Gases also expand when they are heated. Gases expand much more than the liquids and the solids. Like liquids, the gases do not have a definite shape, so they also have only the cubical expansion. . . .

Advantages and disadvantages of expansion properties of solids, liquids and gases

All three states result in taking up more room, also know as expansion. The expansion properties of solids, liquids and gases have some advantages and disadvantages. One advantage of expanding metal is its use in thermometers. The mercury (liquid-metal) in the tube expands when they get hotter. One disadvantage of expansio . . .

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