The Joule-thomson co-efficient is defined as
1
\(\left[\frac{\partial \mathrm{T}}{\partial \mathrm{P}}\right]_{\mathbf{H}}\)
2
\(\left[\frac{\partial \mathrm{T}}{\partial \mathrm{H}}\right]_{\mathbf{H}}\)
3
\(\left[\frac{\partial \mathrm{H}}{\partial \mathrm{T}}\right]_{\mathbf{H}}\)
4
\(\left[\frac{\partial \mathrm{P}}{\partial \mathrm{H}}\right]_{\mathbf{H}}\)