I can't figure this out...if you have a gas in a rigid container, with a membrane separating the gas from a vacuum in the other half of the container, then remove the membrane and allow the gas to expand, is any work done? It's not expanding against force - does that make work done 0?
W = P*V
The Attempt at a Solution
dV is positive, so work is also positive?
Except P = 0 from the other side, which would seem to make W = 0*dV = 0