Thermal Properties of Matter Test - 3

Glass is a ceramic material made from silica.So that it has lower coefficient of volume expansion in comparison to metal and liquid.

Alcohal has higher coefficient of volume expansion in comparison to glass and Invar.

Liquids expand on heating and contract on cooling at moderate temperatures. But water exhibits an exceptional behaviour. When it is heated from 0 ºC, it actually contracts rather than expanding, up to 4 ºC. The volume of water is minimum at 4 ºC. Beyond 4 ºC, water starts expanding.This behaviour of water between 0 ºC and 4 ºC is called anomalous expansion of water..

As and when water is cooled down to its freezing point the thickness T of the ice layer increases. The increase in thickness of ice decreases the rate of cooling of water and thus freezing process slows down.

If temperature deformation is permitted to occur freely, no load or stress will beinduced in the structure. In some cases where temperature deformation is not permitted, an internal stress is created. The internal stress created is termed as thermal stress .

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.