## Frostbite 3 years ago stuff

1. Frostbite

Work so far; $C _{V,m}=\left( \frac{ \partial U _{m} }{ \partial T } \right)_{V}=\frac{ N _{a} \left( \langle \epsilon ^{2} \rangle - \langle \epsilon \rangle ^{2} \right) }{ kT ^{2} }$ $\langle \epsilon \rangle=\sum_{i}^{n}p _{i} \epsilon _{i}$ $\langle \epsilon \rangle=\frac{ 4 }{ q } \epsilon _{0}+\frac{ 2e ^{- \beta \epsilon} }{ q } \epsilon=\frac{ 2e ^{- \beta \epsilon} }{ q } \epsilon$ $\langle \epsilon ^{2} \rangle=\sum_{i=0}^{1} p _{i} \epsilon ^{2} _{i}=\frac{ 4 }{ q } \epsilon _{0} ^{2}+\frac{ 2e ^{- \beta \epsilon} }{ q } \epsilon ^{2}=\frac{ 2e ^{- \beta \epsilon} }{ q } \epsilon ^{2}\\$ $C _{V,m}=\frac{ N _{A}\left( \frac{ 2e ^{- \beta \epsilon} }{ q } \epsilon ^{2}-\left( \frac{ 2e ^{- \beta \epsilon} }{ q } \epsilon \right)^{2} \right) }{ kT ^{2} }$ Now from here things are going down hill. I know I need to substitute the equation: $E=\frac{ hc }{ \lambda } \Leftrightarrow \epsilon=hc \bar{v}$ But at the same time I like to make the expression more simple.

2. amistre64

if your notation is correct, i dont see way that e^2 cant be factored out of the top

3. amistre64

other than that, i got no idea what the setup is doing :)

4. amistre64

its all a bit above my reading abilities :/ srry

5. Frostbite

@abb0t