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Isothermal CompressibilityIsentropic Compressibility

LaTeX Math Inline
bodyT = \rm const

LaTeX Math Inline
bodyS = \rm const

LaTeX Math Block
anchorcT
alignmentleft
c_T = \frac{1}{\rho} \left( \frac{\partial \rho}{\partial p} \right)_T
LaTeX Math Block
anchorcS
alignmentleft
c_S = \frac{1}{\rho} \left( \frac{\partial \rho}{\partial p} \right)_S


Both 

LaTeX Math Inline
bodyc_T
 and 
LaTeX Math Inline
bodyc_S
 are not dependent on the amount of chemical substance and defined under a clear conditions of thermodynamic process and as such are the material properties and properly tabulated for the vast majority of materials.


Compressibility is related to Z-factor 

LaTeX Math Inline
bodyZ
 and Formation Volume Factor (FVF) 
LaTeX Math Inline
bodyB
 as:

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