A cylinder is wrapped in thermal insulation so that all processes are adiabatic. This cylinder has two chambers separated by a thin membrane. On the left side of the partition is an ideal monatomic gas whose state is characterised by the extensive parameters (U0,S0,V0,N0 ) and intensive parameters (T0 ,P0,μ0). The chamber on the right side of the partition has the same volume V0
, but it is evacuated (empty). The partition separating the chambers is broken, so that the gas expands irreversibly to fill the whole chamber of volu meVf=2V0. (iv) Determine the change of entropy that occurs during this expansion. (v) What is the source of entropy increase?