#### Throttling and Joule-Thomson Expansion: Screencasts

Shows the temperature change of non-ideal gases through an adiabatic throttle due to Joule-Thomson expansion.

We suggest you list the important points in this screencast as a way to increase retention.

Describes the Joule-Thomson coefficient and calculates how much liquid forms when a high pressure gas undergoes a J-T expansion. The Peng-Robinson equation of state spreadsheet can be found on www.chethermo.net/software.

We suggest you list the important points in this screencast as a way to increase retention.

##### Important Equations:

Steady-state energy balance for an adiabatic throttle:

\[0= \Delta H\]

where \(\Delta H\) is the change in enthalpy for the fluid from inlet to outlet.

Joule-Thomson coefficient:

\[\mu = \left( \frac{\partial T}{\partial P} \right) _H\]

Note that the same symbol \(\mu\) is used for the J-T coefficient and for chemical potential.