Difference between revisions of "Motive unit"
Line 1: | Line 1: | ||
{{MitoPedia | {{MitoPedia | ||
|abbr=MU | |abbr=MU | ||
|description=The '''motive unit''' [MU] is the 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 | |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 = mol, for the chemical or molar format, <u>''n''</u> | |||
* MU = C, for the electrical format, <u>''e''</u>; | |||
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'', | 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>]. | ||
}} | }} | ||
Communicated by [[Gnaiger E]] 2018-10- | Communicated by [[Gnaiger E]] 2018-10-15 | ||
[[File:Table Physical constants.png|left|600px|thumb|]] | [[File:Table Physical constants.png|left|600px|thumb|]] |
Revision as of 15:58, 15 October 2018
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 NA (O2 molecules per mole O2 [x∙mol-1]), thus obtaining for ze∙NA 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 2018-10-15
MitoPedia concepts: Ergodynamics