As shown in the figure below, a cylinder fitted with a piston is filled with 600 lb of saturated liquid ammonia at 45°F. The piston w 1 ton and has a diameter of 2.5 ft.

As shown in the figure below, a piston-cylinder assembly contains 1 kg of water at T1=200° C and P1 = 1.5 bar holding the piston against the stops. The atmospheric pressure is 1 bar, and you can assume the piston's weight is negligible. The water is slowly cooled until the piston just begins to move downward in the cylinder. What is the pressure (P2), temperature (T2), and volume (V2) of water at this point? (°C), V2 = P2 = (m³) The cooling continues until water has entirely turned into saturated liquid. What is the pressure(P3) and temperature (T3), and volume (V3) of water at this point? (°C), V3 = P3 = (bar), T2 = (bar), T3 = Qtotal Calculate the total work done on the moving boundary of this system during the two processes. W total (kJ) Calculate the total heat transfer during the two processes. (kJ) On paper draw the P-v diagram for water going through the above processes. Show your detailed work on paper. hint: you must also find v1, u1, and u3. Patm = 1 bar Piston (m³) Stops

A spherical balloon is filled with 6 kg of hydrogen gas (H2) at 2 bar and 20 °C. Which nearly gives the diameter of the balloon in meters when it reaches an altitude where the pressure and temperature are 0.2 bar and -60 °C ? Note: 1 bar=100kPaa. а. 1.23 O b. 7.97 О с. 5.61 O d. 2.13

b. Two cylinders are filled with liquid water (p = 998 kg/m³), and connected by a pipe line with a closed valve. Cylinders A (inside diameter = 42.75 cm) and B (inside diameter = 55 cm) contain 125 kg and 450 kg of water, respectively. The height h as indicated in Fig. 3 is 0.85 m. Determine the pressure (in kPa) of cylinder A and cylinder B on either side of the valve. If the valve is opened such that water flows to an equilibrium between the two cylinders, find the final pressure (in atm) at the valve location. Assume Po= 100 kPa. k Po B g Figure 3 Po A