A cylinder, Acyl 7.012 cm2, has two pistons mounted, the upper one, mp1 100 kg, initially resting on the stops. The lower piston, mp2 0 kg, has 2 kg water below it, with a spring in vacuum connecting the two pistons. The spring force is zero when the lower piston stands at the bottom, and when the lower piston hits the stops the volume is 0.3 m3. The water, initially at 50 kPa, V 0.00206 m3, is then heated to saturated vapor.
a. Find the initial temperature and the pressure that will lift the upper piston.
b. Find the final T, P, v and the work done by the water.