Compressibility Factor Calculator

Analyze Real Gas Behavior

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Compressibility Factor (Z) Calculator

Calculate the compressibility factor using pressure, volume, temperature, and moles.

Compressibility Factor: -

Reduced Properties Calculator

Calculate reduced temperature and pressure using critical properties.

Reduced Temperature: -
Reduced Pressure: -

Virial Equation Calculator

Calculate Z factor using the virial equation truncated to the second virial coefficient.

Virial Z Factor: -

Understanding Compressibility Factor

What is Compressibility Factor?

The compressibility factor (Z) measures real gas deviation from ideal behavior:

  • Z = 1 for ideal gases
  • Z > 1 indicates positive deviation
  • Z < 1 indicates negative deviation
  • Varies with temperature and pressure

Reduced Properties

Reduced properties help in analyzing gas behavior:

  • Tr = T/Tc (reduced temperature)
  • Pr = P/Pc (reduced pressure)
  • Used in corresponding states principle
  • Help predict gas behavior

Virial Equation

The virial equation is a power series expansion:

  • Z = 1 + B/V + C/V² + ...
  • B is second virial coefficient
  • Accounts for two-body interactions
  • Temperature dependent coefficients

Applications

Understanding compressibility is crucial for:

  • Gas storage and transport
  • Industrial process design
  • Natural gas operations
  • High-pressure systems
  • Gas mixture behavior

Essential Compressibility Formulas

Compressibility Factor

Z = PV/nRT

Where P is pressure, V is volume, n is moles, R is gas constant, T is temperature

Reduced Properties

Tr = T/Tc

Pr = P/Pc

Virial Equation

Z = 1 + BP/RT

Where B is the second virial coefficient