can we say that the different thermal coefficient of expansion are related for a given material. Explain
Answers
Explanation:
Linear Expansion
Thermal expansion is the tendency of matter to change in volume in response to a change in temperature.
LEARNING OBJECTIVES
Describe volume changes that take place in response to a temperature change
KEY TAKEAWAYS
Key Points
Inter-particle potential usually takes an asymmetric form, rather than a symmetric form as a function of particle-particle distance. This is why matters expands and contracts as temperature changes.
The change in length measurements of an object due to thermal expansion is related to temperature change by a “linear expansion coefficient”, which is given as
α
L
=
1
L
dL
dT
.
The linear expansion coefficient is as an approximation over a narrow temperature interval only.
Key Terms
potential: A curve describing the situation where the difference in the potential energies of an object in two different positions depends only on those positions.
Thermal expansion is the tendency of matter to change in volume in response to a change in temperature. (An example of this is the buckling of railroad track, as seen in. ) Atoms and molecules in a solid, for instance, constantly oscillate around its equilibrium point. This kind of excitation is called thermal motion. When a substance is heated, its constituent particles begin moving more, thus maintaining a greater average separation with their neighboring particles. The degree of expansion divided by the change in temperature is called the material’s coefficient of thermal expansion; it generally varies with temperature.