GLOSSARY

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Both 

LaTeX Math Inline
bodyC_P
 and 
LaTeX Math Inline
bodyC_V
 are proportional to the amount of chemical substance involved in a heat transfer process and as such are not the material properties.

The ratio 

LaTeX Math Inline
body\gamma = C_P/C_V
 is called a Heat Capacity Ratio (γ) or Adiabatic Index (γ) or Isentropic expansion factor (κ) and is a material property.


Based on Mayer's relation the Isobaric heat capacity is always greater than Isochoric heat capacity:

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