Heat capacity

At constant volume

$C_{v}=\left.{\frac {\partial U}{\partial T}}\right\vert _{V}$

At constant pressure

Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle C_{p}=\left.{\frac {\partial H}{\partial T}}\right\vert _{p}}