If an equation of state is available, it can be used to predict the values of the thermal expansion at all the required temperatures and pressures, along with many other See more

Unlike gases or liquids, solid materials tend to keep their shape when undergoing thermal expansion.
Thermal expansion generally decreases with increasing See more

The coefficient of thermal expansion describes how the size of an object changes with a change in temperature. Specifically, it … See more

Since gases fill the entirety of the container which they occupy, the volumetric thermal expansion coefficient at constant pressure, $${\displaystyle \alpha _{V}}$$, is the only one of interest.
For an ideal gas, a formula can be readily obtained by … See more

A number of materials contract on heating within certain temperature ranges; this is usually called negative thermal expansion, rather than "thermal contraction". For example, the … See more

Thermal expansion changes the space between particles of a substance, which changes the volume of the substance while negligibly changing its mass (the negligible amount comes from mass–energy equivalence), thus changing its density, which … See more

When calculating thermal expansion it is necessary to consider whether the body is free to expand or is constrained. If the body is free to … See more