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Wednesday, 20 May 2015

Solids Expand On Heating And Contract On Cooling

Why do solids expand a bit on heating and contract a bit on cooling? 

The solid molecules do not have sufficient inter-molecular (or inter particle) space thus it expands a bit on heating. The inter-particle forces of attraction are very strong which do not let solid particles to leave its mean position. Therefore solid pcontracts a bit on cooling.

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