Standard chemical potential
= Standard chemical potential
{title2=$\mu^\circ$}
The <chemical potential> assigned to a specified <standard state>. With dimensionless <thermodynamic activity> $a$, the per-particle convention is $\mu=\mu^\circ+k_BT\ln a$; a molar convention uses $RT$. The <standard state> changes both $\mu^\circ$ and the activity definition without changing observable <equilibrium>.