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Difference between revisions of "Motive unit"

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{{MitoPedia
{{MitoPedia
|abbr=MU
|abbr=MU
|description=The '''motive unit''' [MU] is the variable SI unit in which the [[motive entity]] (transformant) of a transformation is expressed, which depends on the energy transformation under study and on the chosen format. Fundamental MU for electrochemical transformations are:
|description=The '''motive unit''' [MU] is the variable SI unit in which the [[motive entity]] (transformant) of a transformation is expressed, which depends on the energy transformation under study and on the chosen [[format]]. Fundamental MU for electrochemical transformations are:


* MU = x, for the particle or molecular format, <u>''N''</u>
* MU = x, for the particle or molecular format, <u>''N''</u>
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For the [[protonmotive force]] the motive entity is the proton with charge number ''z''=1.  The protonmotive force is expressed in the electrical or molar format with MU J/C=V or J/mol=Jol, respectively. The conjugated flows, ''I'', are expressed in corresponding electrical or molar formats, C/s = A or mol/s, respectively.
For the [[protonmotive force]] the motive entity is the proton with charge number ''z''=1.  The protonmotive force is expressed in the electrical or molar format with MU J/C=V or J/mol=Jol, respectively. The conjugated flows, ''I'', are expressed in corresponding electrical or molar formats, C/s = A or mol/s, respectively.


The charge number, ''z'', has to be considered in the conversion of motive units (compare Table below), if a change not only of units but a transition between the entity elementary charge and an entity with charge number different from unity is involved (''e.g.'', O<sub>2</sub> with ''z''=4). The ratio of elementary charges per O<sub>2</sub> molecule (''z''<sub>O2</sub>=4) is multiplied by the elementary charge (''e'', coulombs per electron), which yields coulombs per O<sub>2</sub> [C∙x<sup>-1</sup>]. This in turn is multiplied with ''N''<sub>A</sub> (O<sub>2</sub> molecules per mole O<sub>2</sub> [x∙mol<sup>-1</sup>]), thus obtaining for ''ze''∙''N''<sub>A</sub> the ratio of elementary charges [C] per amount of O<sub>2</sub> [mol<sup>-1</sup>]. The conversion factor for O<sub>2</sub> is 385.94132 C∙mmol<sup>-­1</sup>].
The [[charge number]], ''z'', has to be considered in the conversion of motive units (compare Table below), if a change not only of units but a transition between the entity [[elementary charge]] and an entity with charge number different from unity is involved (''e.g.'', O<sub>2</sub> with ''z''=4). The ratio of elementary charges per O<sub>2</sub> molecule (''z''<sub>O<small>2</small></sub>=4) is multiplied by the elementary charge (''e'', coulombs per electron), which yields coulombs per O<sub>2</sub> [C∙x<sup>-1</sup>]. This in turn is multiplied with the [[Avogadro constant]], ''N''<sub>A</sub> (O<sub>2</sub> molecules per mole O<sub>2</sub> [x∙mol<sup>-1</sup>]), thus obtaining for ''ze''∙''N''<sub>A</sub> the ratio of elementary charges [C] per amount of O<sub>2</sub> [mol<sup>-1</sup>]. The conversion factor for O<sub>2</sub> is 385.94132 C∙mmol<sup>-­1</sup>.
}}
}}
  Communicated by [[Gnaiger E]] 2018-10-15
  Communicated by [[Gnaiger E]] 2018-10-20
 
<gallery mode=default perrow=2 widths="500px" heights="300px">
File:Table Physical constants.png
File:Motive formats and units.png|Converstion between different motive formats and corresponding motive units
</gallery>
 
{{Keywords SI base units}}


[[File:Table Physical constants.png|left|600px|thumb|]]
{{MitoPedia concepts
{{MitoPedia concepts
|mitopedia concept=Ergodynamics
|mitopedia concept=Ergodynamics
}}
}}

Revision as of 06:33, 14 August 2019


high-resolution terminology - matching measurements at high-resolution


Motive unit

Description

The motive unit [MU] is the variable SI unit in which the motive entity (transformant) of a transformation is expressed, which depends on the energy transformation under study and on the chosen format. Fundamental MU for electrochemical transformations are:

  • MU = x, for the particle or molecular format, N
  • MU = mol, for the chemical or molar format, n
  • MU = C, for the electrical format, e;

For the protonmotive force the motive entity is the proton with charge number z=1. The protonmotive force is expressed in the electrical or molar format with MU J/C=V or J/mol=Jol, respectively. The conjugated flows, I, are expressed in corresponding electrical or molar formats, C/s = A or mol/s, respectively.

The charge number, z, has to be considered in the conversion of motive units (compare Table below), if a change not only of units but a transition between the entity elementary charge and an entity with charge number different from unity is involved (e.g., O2 with z=4). The ratio of elementary charges per O2 molecule (zO2=4) is multiplied by the elementary charge (e, coulombs per electron), which yields coulombs per O2 [C∙x-1]. This in turn is multiplied with the Avogadro constant, NA (O2 molecules per mole O2 [x∙mol-1]), thus obtaining for zeNA the ratio of elementary charges [C] per amount of O2 [mol-1]. The conversion factor for O2 is 385.94132 C∙mmol-1.

Abbreviation: MU

Communicated by Gnaiger E 2018-10-20

Template:Keywords SI base units


MitoPedia concepts: Ergodynamics