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Standard Absolute Activity

Applicable units are those of quantitykind:StandardAbsoluteActivity

The "Standard Absolute Activity" is proportional to the absoulte activity of the pure substance $B$ at the same temperature and pressure multiplied by the standard pressure.

http://en.wikipedia.org/wiki/Activity_coefficient

http://www.iso.org/iso/catalogue_detail?csnumber=31894

$\lambda_B^\Theta = \lambda_B^*(p^\Theta)$, where $\lambda_B^\Theta$ the absolute activity of the pure substance $B$ at the same temperature and pressure, and $p^\Theta$ is standard pressure.

$\lambda_B^\Theta$