@wikipedia
The density of mixture can be calculated from its composition as composition:
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\rho = \frac{P}{R \, T} \cdot \sum_\alpha \ x_\alpha \cdot M_\alpha |
where
The relative density then can be found as:
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\gamma = \left( \sum_\alpha \ x_\alpha \cdot M_\alpha \right) \big / M_{\rm ref} |
where
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| body | --uriencoded--M_%7B\rm ref%7D |
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is the
molar mass of the reference fluid (usually, water or air depending on the context).
The
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does not depend on
mixture temperature and pressure explicitly but it does implicitly through the corresponding value of the reference fluid
molar mass | LaTeX Math Inline |
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| body | --uriencoded--M_%7B\rm ref%7D |
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.
The usual practice is to calculate the fluid mixture density at STP and then use pressure-density correlations to predict its properties at various temperature and pressure.
See Also
Natural Science / Chemistry / Chemical Substance / Mixture / Mixture composition
[ Pure substance ][ Mole fraction ]
