Sackur-Tetrode equation (source code)

= Sackur-Tetrode equation
{c}
{wiki=Sackur–Tetrode_equation}

In the classical dilute regime, a monatomic ideal gas has entropy
$$
S=Nk_B\left[\log\left(\frac{V}{N\lambda^3}\right)+\frac52\right].
$$