Question

Thermal expansion of a solid is due to the

• A. Symmetric characteristic of the interatomic potential energy curve of the solid.
• B. Asymmetric characteristics of the interatomic potential energy curve of the solid.
• C. Force between atoms get weaker.
• D. Rotational motion of the atoms of the solid.

Answer 1

The correct option is B Asymmetric characteristics of the interatomic potential energy curve of the solid.


Thermal expansion is the increase, or decrease, of the size (length, area, or volume) of a body due to a change in temperature.
At high temp, equilibrium distance between atoms is high.