Amount of heat required to change the temperature of one unit of mole by one unit of temperature:
| (1) | c = \frac{C}{\nu} = \frac{1}{\nu} \cdot \frac{\delta Q}{\delta T} |
where
\nu | amount of chemical substance | C | heat capacity of the material |
Molar Heat Capacity is related to Specific Heat Capacity c_m and Volumetric Heat Capacity c_v as:
|
|
where
M | molar mass of the substance | V_m | molar volume of the substance |
Molar Heat Capacity depends on the way the heat is transferred and as such is not a material property.
The two major heat transfer processes are isobaric and isohoric which define:
Based on Mayer's relation the Isobaric molar heat capacity is always greater than Isochoric molar heat capacity:
| (4) | c_P \geq c_V |
The Molar Heat Capacity of the mixture in thermodynamic equilibrium follows the simple mixing rule:
| (5) | c = \sum_i \, x_i \, c_i |
where
x_i | mole fraction of the i-th mixture component, subjected to \sum_i x_i= 1 |
c_i | molar heat capacity of the i-th mixture component |
See also
Physics / Thermodynamics / Thermodynamic process / Heat Transfer / Heat Capacity
[ Heat ][ Mayer's relation ]