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Volume V is a derived quantity based on the SI base quantity length [m] and is expressed in terms of SI base units in the derived unit cubic meter [m3]. The liter [L = dm3] is a conventional unit of volume for concentration and is used for most solution chemical kinetics. The volume V contained in a system (experimental chamber) is separated from the environment by the system boundaries; this is called the volume of the system, and described in practical language as big/small (derived from length, height) or voluminous. Systems are defined at constant volume or constant pressure. For a pure sample S, the volume VS of the pure sample equals the volume V of the system, VS = V. For sample s in a mixture, the ratio Vs·V-1 is the nondimensional volume fraction Φs of sample s. Quantities divided by volume are concentrations of sample s in a mixture, such as count concentration CX = NX·V-1 [x·L-1], and amount of substance concentration CB = nB·V-1 [mol·L-1]. Mass concentration is density ρs = ms·V-1 [kg·L-1]. In closed compressible systems (with a gas phase), the concentration of the gas increases, when pressure-volume work is performed on the system.

Abbreviation: V [m3]; 1 m3 = 1000 L

Reference: BEC 2020.1, Gnaiger MitoFit Preprint Arch 2020.4

Communicated by Gnaiger E (2020-05-28)


Bioblast linkReferenceYear
Bureau International des Poids et Mesures (2019) The International System of Units (SI). 9th edition:117-216 ISBN 978-92-822-2272-0.2019
Gnaiger Erich (2020) A X-mass Carol. Account of the elementaries of Body Mass Excess. MitoFit Preprint Arch 2020.4.v0.
Gnaiger Erich (2020) Canonical reviewer's comments on: Bureau International des Poids et Mesures (2019) The International System of Units (SI) 9th ed. MitoFit Preprint Arch 2020.4 doi:10.26124/mitofit:200004.2020
Gnaiger Erich et al ― MitoEAGLE Task Group (2020) Mitochondrial physiology. Bioenerg Commun 2020.1. doi:10.26124/bec:2020-0001.v1.2020



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