Air in a piston/cylinder arrangement, shown in Fig. P8.135, is at 30 lbf/in.2, 540 R with...

Air in a piston/cylinder arrangement, shown in Fig. P8.135, is at 30 lbf/in.2, 540 R with a volume of 20 ft3. If the piston is at the stops, the volume is 40 ft3 and a pressure of 60 lbf/in.2 is required. The air is then heated from the initial state to 2700 R by a 3400-R reservoir. Find the total irreversibility in the process, assuming the surroundings are at 70 F.

FIGURE P8.135