Problem 6.045 a rigid, insulated vessel is divided into two compartments connected by a valve. initially, one compartment, occupying 1.0 ft3, contains air at 50 lbf/in2, 525or, and the other, occupying 2.0 ft3, is evacuated. the valve is opened and the air is allowed to fill both volumes. assume the air behaves as an ideal gas and that the final state is in equilibrium. determine the final temperature of the air, in or, and the amount of entropy produced, in btu/or.

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?