Advancement

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Advancement

Description

In an isomorphic analysis, any form of flow is the advancement of a process per unit of time, expressed in a specific motive unit [MU∙s^-1], e.g., ampere for electric flow or current [A≡C∙s^-1], watt for heat flow [W≡J∙s^-1], and for chemical flow the unit is [mol∙s^-1]. The corresponding isomorphic forces are the partial exergy (Gibbs energy) changes per advancement [J∙MU^-1], expressed in volt for electric force [V≡J∙C^-1], dimensionless for thermal force, and for chemical force the unit is [J∙mol^-1], which deserves a specific acronym ([Jol]) comparable to volt. For chemical processes of reaction and diffusion, the advancement is the amount of motive substance [mol]. The concept was originally introduced by De Donder. Central to the concept of advancement is the stoichiometric number, ν_X, associated with each motive component X (transformant [1]).

In a chemical reaction, r, the motive entity is the stoichiometric amount of reactant, d_rn_X, with stoichiometric number ν_X. The advancement of the chemical reaction, d_rξ [mol], is then defined as

drξ = drnX·νX-1

The flow of the chemical reaction, I_r [mol·s^-1], is advancement per time,

Ir = drξ·dt-1

Abbreviation: d_trξ

Reference: Gnaiger (1993) Pure Appl Chem

Communicated by Gnaiger E 2018-10-16

» Advancement per volume, d_trY = d_trξ∙V^-1

References

1. Gnaiger E (1993) Nonequilibrium thermodynamics of energy transformations. Pure Appl Chem 65:1983-2002. - »Bioblast link«

MitoPedia concepts: MiP concept, Ergodynamics