Compressibility under isothermal (constant temperature T = \rm const) compression/decompression thermodynamic process:
(1) | c_T = \frac{1}{\rho} \left( \frac{\partial \rho}{\partial p} \right)_T = - \frac{1}{V_m} \left( \frac{\partial V_m}{\partial p} \right)_T |
Isothermal Compressibility is material property and inverse to Isothermal bulk modulus K_T:
(2) | \beta_T = \frac{1}{K_T} |
See also
Physics / Mechanics / Continuum mechanics / Continuum body / Compressibility