What is thermal expansion in simple words?

Published by Charlie Davidson on

What is thermal expansion in simple words?

Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature. The degree of expansion divided by the change in temperature is called the material’s coefficient of thermal expansion. It is found to generally vary with temperature.

What is thermal expansion explained for kids?

In physics, thermal expansion is the likelihood of matter to change in volume in response to a change in temperature. When a substance is heated, its basic particles move around more quickly and by doing so generally maintain a greater average separation.

What is thermal expansion give example?

The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, which is the change in size or volume of a given system as its temperature changes. The most visible example is the expansion of hot air.

What is an example of thermal expansion in everyday life?

Other examples of thermal expansion include: – The air in a car tyre gets warm after a long journey and this increases its pressure. – Railway lines require expansion gaps (similar to bridges) to avoid buckling in hot weather.

What is the reason of thermal expansion?

Thermal expansion occurs when an object expands or gets larger due to an increase in its temperature. Thermal expansion occurs because heated molecules move faster and take up more space.

What is the example of expansion?

Substances expand (increase in size) when they get warmer, and they contract (decrease in size) when they get cooler. This property can be useful. For example: Thermometers work because the liquid inside them expands and rises up the tube when it gets hotter.

How can we prevent thermal expansion?

One approach is to restrict the stress to the piping and so avoid the need for beefed-up equipment flanges, etc. Special pipe supports can prevent stress from being transferred to equipment. Materials with a lower coefficient of thermal expansion (α) grow less when heated.

How do you fix thermal expansion?

The only truly effective solution is to install a water expansion tank that provides the extra space for water expanded through heating. If you know you have a closed plumbing system, or if you’ve had thermal expansion water heater damage, you should install an expansion tank.

What are the disadvantage of thermal expansion?


  • changing of shape and dimensions of objects such as doors..
  • wall collapsing due to bulging..
  • cracking of glass tumbler due to heating..
  • bursting of metal pipes carrying hot water or steam…

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