Thermal Expansion


 
 
Concept Explanation
 

Thermal Expansion

On heating a substance, its  physical properties change, an important effect is the increase in the size of the substance. This is called thermal expansion of matter. Thermal expansion is lowest in solids and highest in gases.

Thermal Expansion in Solids :

Three types of diffusion are possible in solids-

(i) Linear expansion coefficient

     alpha=frac{Increase in length}{Initial length times Heat rise}

(ii) Regional expansion coefficient

   beta=frac{Increase in area}{Initial area times Heat rise}

(iii) Volume expansion coefficient

   gamma=frac{Increase in volume}{Early times Heart rise}

Relation in Thermal Expansion Coefficients

           alpha :beta :gamma=1:2:3

           alpha =frac{beta }{2} or beta =2alpha ;   alpha =frac{gamma}{3} or gamma= 3alpha

.... (More Text Available, Login?)
 
 


Students / Parents Reviews [10]