Please wait for the animation to completely load.

There is a time delay—since the system must be in equilibrium—before the change of state occurs.

In this animation N = nR (i.e., k_B = 1). This, then, gives the ideal gas law as PV = NT. Restart.

1. Rank the expansions by the work done by the gas (from negative to positive).
2. Rank the expansions by change in internal energy (from negative to positive).
3. From these rankings, if possible, rank the expansions according to the heat required (again from negative to positive).

When you get a good-looking graph, right-click on it to clone the graph and resize it for a better view.

Problem authored by Anne J. Cox.