## Wikipedia - Aktivität (Chemie) absolute activity, $$\lambda$$

https://doi.org/10.1351/goldbook.A00019
The exponential of the ratio of the @C01032@, $$\mu$$, to $$R\,T$$ where $$R$$ is the @G02579@ and $$T$$ the @T06321@, $$\lambda=\text{e}^{\,\mu/RT}$$.
Source:
Green Book, 2nd ed., p. 40 [Terms] [Book]