Vibrational entropy
= Vibrational entropy
{title2=$S_{\rm vib,m}/R=x/(e^x-1)-\ln(1-e^{-x})$}
The harmonic-oscillator <entropy> contribution for one vibrational coordinate, with $x=\theta_{\rm vib}/T$. Contributions from independent <normal modes> add, with one term for each component of a degenerate mode. A temperature-independent <zero-point energy> does not change this <entropy>.