Amount of of heat to to be supplied to a given amount of a material to produce a unit change in its its temperature:
| LaTeX Math Block | ||
|---|---|---|
| ||
C = \frac{\delta Q}{\delta T} |
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Heat Capacity depends on the way the heat is is transferred and as such is not a table property of the matter.
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Both
and LaTeX Math Inline body C_P
are proportional to the amount of chemical substance involved in a heat transfer process and as such are not the material properties.LaTeX Math Inline body C_V
The ratio
is called a Heat Capacity Ratio (γ) or Adiabatic Index (γ) or Isentropic expansion factor (κ) and is a material property.LaTeX Math Inline body \gamma = C_P/C_V
Based on Mayer's relation the Isobaric heat capacity is always greater than Isochoric heat capacity:
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Overall, there are totally six different intensive physical properties related to heat capacity material measures:
| Molar Heat Capacity | Specific heat capacity | Volumetric Heat Capacity | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Isobaric (V= const) |
| Isobaric specific heat capacity
| Isobaric volumetric heat capacity
| |||||||||||||||||||||
| Isochoric (P = const) |
| Isochoric specific heat capacity
| Isochoric volumetric heat capacity
|
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