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Display information for equation id:math.2571.40 on revision:2571
* Page found: Spezifische Wärme zweiatomiger idealer Gase (eq math.2571.40)
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\begin{align}
& {{Z}_{S}}=\sum\limits_{n=0}^{\infty }{{}}\exp \left( -\beta \left( \hbar \omega \left( n+\frac{1}{2} \right) \right) \right)=\exp \left( -\beta \hbar \omega \frac{1}{2} \right)\sum\limits_{n=0}^{\infty }{{}}{{\left[ \exp \left( -\beta \hbar \omega \right) \right]}^{n}} \\
& =\exp \left( -\beta \hbar \omega \frac{1}{2} \right)\frac{1}{1-\left[ \exp \left( -\beta \hbar \omega \right) \right]} \\
& {{U}_{S}}=-N\frac{\partial }{\partial \beta }\ln {{Z}_{S}}=N\left( \frac{1}{\left[ \exp \left( \beta \hbar \omega \right)-1 \right]}+\frac{1}{2} \right)\hbar \omega =N\left( \left\langle n \right\rangle +\frac{1}{2} \right)\hbar \omega \\
& {{c}_{Vs}}={{N}_{A}}\frac{\partial }{\partial T}\left( \frac{1}{\left[ \exp \left( \frac{\hbar \omega }{kT} \right)-1 \right]}+\frac{1}{2} \right)\hbar \omega ={{N}_{A}}k\frac{{{\left( \frac{{{\Theta }_{S}}}{T} \right)}^{2}}{{e}^{\left( \frac{{{\Theta }_{S}}}{T} \right)}}}{{{\left( {{e}^{\left( \frac{{{\Theta }_{S}}}{T} \right)}}-1 \right)}^{2}}} \\
& {{\Theta }_{S}}:=\frac{\hbar \omega }{k} \\
\end{align}
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