Since a is a constant unknown coefficient it can be said that 3a is a new constant unknown coefficient named the coefficient of volume thermal expansion v. Illustrates that in general substances expand or contract when their temperature changes with expansion or contraction occurring in all directions. For a solid we can ignore the effects of pressure on the material and the volumetric thermal expansion coefficient can be written.
The volumetric expansion coefficient would be 02 for 50 K or 0004 K 1.
The volumetric thermal expansion coefficient is the most basic thermal expansion coefficient. These three coefficients of expansion for a given solid are not constant because these values totally depend on the temperature. The volumetric thermal expansion coefficient is the most basic thermal expansion coefficient. If we already know the expansion coefficient then we can calculate the change in volume.