  If the partition is inserted at the middle point, the molecule is caught on one side or the other with equal probability. Now if it is known which side the molecule is on, it is possible to connect up the partition to a pulley and extract work. Based upon the ideal gas law, PV=NkT, for the case where N=1, it is a standard calculation to show that the maximum work extracted as the partition moves to the side of the box is kT  ln 2.  As the molecule is assumed to be in thermal contact with the heat bath at all times, the kinetic energy of the molecule is maintained at (3/2)kT, and the work extracted is drawn from the heat bath. Once the partition reaches the side of the box, it can be removed and the cycle has been completed. Heat has been extracted from the heat bath and converted into work, with apparent certainty.  The process may be repeated indefinitely to continue the certain extraction of work. If this succeeds, Smoluchowski's modified second law appears to be violated.