What is specific heat? Give its unit and on which factors does specific heat depend?

(N/A) Specific heat is defined as the heat capacity per unit mass of a body.
$s = \frac{\text{Heat capacity}}{\text{Mass of body}}$
$s = \frac{\Delta Q}{m \Delta T}$
$\therefore \Delta Q = m s \Delta T$
The $SI$ unit of specific heat is $J \cdot kg^{-1} \cdot K^{-1}$.
The magnitude of specific heat depends on the nature of the material of the body,the temperature range,and the conditions under which heat is supplied (e.g.,constant pressure or constant volume).
Heat capacity per mole of a substance is known as molar specific heat capacity $(C)$:
$C = \frac{S}{\mu} = \frac{1}{\mu} \frac{\Delta Q}{\Delta T}$
Molar specific heat capacity is independent of the amount of substance. Its unit is $J \cdot mol^{-1} \cdot K^{-1}$.

Substance	Specific Heat $(J \cdot kg^{-1} \cdot K^{-1})$	Molar Specific Heat $(J \cdot mol^{-1} \cdot K^{-1})$
Aluminium	$900.0$	$24.4$
Carbon	$506.5$	$6.1$
Copper	$386.4$	$24.5$
Lead	$127.7$	$26.5$
Silver	$236.1$	$25.5$
Tungsten	$134.4$	$24.9$

Experimental values agree with the predicted value of $3R$ at ordinary temperatures (except for Carbon). This agreement breaks down at low temperatures.