Volume fraction

In chemistry, the volume fraction \phi_i is defined as the volume of a constituent V_i divided by the volume of all constituents of the mixture V prior to mixing[1]:

\phi_i = \frac {V_i}{V}

The SI-unit is m3/m3.

Volume fraction is also called volume concentration in ideal solutions where the volumes of the constituents are additive (their sum equals the volume of the mixtures).

The sum of all volume fractions of a mixture is equal to 1:

\sum_{i=1}^{N} V_i = V�; \sum_{i=1}^{N} \phi_i = 1

See also

References

  1. ^ IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version:  (2006–) "volume fraction".
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