Thermal expansion

During heat transfer, the energy of the interatomic bonds stored in the molecules changes; the stored energy increases, and the bond length of the molecules increases. So a solid generally expands the response of cooling to heating and contracts; this response to changes in air temperature is expressed as its coefficient of thermal expansion.
The coefficient of thermal expansion is a thermodynamic property of a substance; it relates to the linear dimensional change of a material with a change in temperature; it is the rate of change in length at each degree of temperature change.
The linear expansion coefficients of different materials are different, and the user can use this calculator to accurately calculate the linear expansion value of the material.

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