A piston/cylinder arrangement, shown in Fig. P3.111, contains air at 250 kPa, 300C. The 50-kg piston has

Question:

A piston/cylinder arrangement, shown in Fig. P3.111, contains air at 250 kPa, 300°C. The 50-kg piston has a diameter of 0.1 m and initially pushes against the stops. The atmosphere is at 100 kPa and 20°C. The cylinder now cools as heat is transferred to the ambient.
a. At what temperature does the piston begin to move down?
b. How far has the piston dropped when the temperature reaches ambient?