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Departure function

Index Departure function

In thermodynamics, a departure function is defined for any thermodynamic property as the difference between the property as computed for an ideal gas and the property of the species as it exists in the real world, for a specified temperature T and pressure P. Common departure functions include those for enthalpy, entropy, and internal energy. [1]

12 relations: Acentric factor, Compressibility factor, Critical point (thermodynamics), Enthalpy, Entropy, Equation of state, Gibbs free energy, Ideal gas, Internal energy, Reduced properties, Residual property (physics), Thermodynamics.

Acentric factor

The acentric factor \omega is a conceptual number introduced by Kenneth Pitzer in 1955, proven to be very useful in the description of matter.

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Compressibility factor

The compressibility factor (Z), also known as the compression factor or the gas deviation factor, is a correction factor which describes the deviation of a real gas from ideal gas behavior.

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Critical point (thermodynamics)

In thermodynamics, a critical point (or critical state) is the end point of a phase equilibrium curve.

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Enthalpy

Enthalpy is a property of a thermodynamic system.

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Entropy

In statistical mechanics, entropy is an extensive property of a thermodynamic system.

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Equation of state

In physics and thermodynamics, an equation of state is a thermodynamic equation relating state variables which describe the state of matter under a given set of physical conditions, such as pressure, volume, temperature (PVT), or internal energy.

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Gibbs free energy

In thermodynamics, the Gibbs free energy (IUPAC recommended name: Gibbs energy or Gibbs function; also known as free enthalpy to distinguish it from Helmholtz free energy) is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure (isothermal, isobaric).

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Ideal gas

An ideal gas is a theoretical gas composed of many randomly moving point particles whose only interactions are perfectly elastic collisions.

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Internal energy

In thermodynamics, the internal energy of a system is the energy contained within the system, excluding the kinetic energy of motion of the system as a whole and the potential energy of the system as a whole due to external force fields.

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Reduced properties

In thermodynamics, the reduced properties of a fluid are a set of state variables normalized by the fluid's state properties at its critical point.

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Residual property (physics)

In thermodynamics a residual property is defined as the difference between a real gas property and an ideal gas property, both considered at the same pressure, temperature, and composition.

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Thermodynamics

Thermodynamics is the branch of physics concerned with heat and temperature and their relation to energy and work.

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References

[1] https://en.wikipedia.org/wiki/Departure_function

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