Free expansion of Real Gases - Dieterici EoS, Change in Temperature

[Chestermiller]

I think this should have only been the answer. But the problem is V0 is not given in the question and we used this symbol on our own.

Vo is the initial volume of the gas. The full volume of the container V is equal to 2Vo, and V is given.

Also, this equation is only the limiting result (in the limit of small a) of our more comprehensive analysis.