# Area Thermal Expansion Coefficient

Written by Jerry Ratzlaff on . Posted in Thermodynamics

## Area Thermal Expansion Coefficient

Area thermal expansion coefficient ( $$\gamma$$ ) (also known as coefficient of aerial thermal expansion) is the ratio of the change in size of a material to its change in temperature.

### Area Thermal Expansion Coefficient FORMULA

$$\gamma = \frac { 1 }{ A } \frac {\Delta A } {\Delta T}$$          $$area \;thermal \; expansion \; coefficient \;=\; \frac { 1 }{ area \; of \; object } \;\;x\;\; \frac { area \; differential } { temperature \; differential }$$

Where:

$$\gamma$$ (Greek symbol gamma) = area thermal expansion coefficient

$$A$$ = area of the object

$$\Delta A$$ = area differential

$$\Delta T$$ = temperature differential