Entropy, Irreversibility and the Principle of Increasing Entropy

Control console

Open the valve between a charged vessel and an evacuated one and record the temperature change of the gas.

Gas

Initial pressure in vessel A

MPa

pwrmeasfault

Select the gas and the initial pressure. Vessel B is evacuated.
Take the reading; the apparatus reports the temperature before and immediately after the expansion.
Repeat for several initial pressures and for at least three gases.
Plot the temperature drop against the change in 1/V_m and obtain the Joule coefficient.
Compute the entropy change of the gas and of the universe.

standby

No readings on this channel yet. Set the controls and press Open valve.

A fresh page. Take your first reading and it will be entered here.

Take at least one reading to plot.