3-51 A piston-cylinder device contains 0.005m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 600kPa. Heat is transferred at constant pressure until the temperature reaches 200C. (a) What is the initial temperature of the water? (b) Determine the total mass of the water. (c) Calculate the final volume. (d) Show the process 3-61 A rigid tank initially contains 1.4kg saturated liquid water at 200C. At this state, 25 percent of the volume is occupied by water and the rest by air. Now heat is supplied to the water until the tank contains saturated vapor only. Determine (a) the volume of the tank, (b) the final temperature and pressure, and (c) the internal energy change of the water. 5 points 3-96 A 3.27- m3 tank contains 100kg of nitrogen at 175K. Determine the pressure in the tank using the ideal-gas equation. 2 points 3-28 A 1.8m3 rigid tank contains steam at 220C. Onethird of the volume is in the liquid phase and the rest is in the vapor form. Determine (a) the pressure of the steam, (b) the quality of the saturated mixture, and (c) the density of the mixture. 3 points 3-43 100kg of R-134a at 200kPa are contained in a piston-cylinder device whose volume is 12.322m3. The piston is now moved until the volume is one-half its original size. This is done such that the pressure of the R-134a does not change. Determine the final temperature and the change in the total internal energy of the R-134a. 344 Water initially at 200kPa and 300C is contained in a piston-cylinder device fitted with stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor and the piston rests on the stops. Then the water continues to cool until the pressure is 100kPa. On the Tv diagram, sketch, with respect to the saturation lines, the process curves passing through the initial, intermediate, and final states of the water. Label the T,P, and v values for end states on the process curves. Find the overall change in internal energy between the initial and final states per unit mass of water. 5 points 3-45 Saturated steam coming off the turbine of a steam power plant at 40C condenses on the outside of a 3-cm-outerdiameter, 35-m-long tube at a rate of 70kg/h. Determine the rate of heat transfer from the steam to the cooling water flowing through the pipe. 2 points 3-47 Water is boiled at 1 atm pressure in a 25cm-internaldiameter stainless steel pan on an electric range. If it is observed that the water level in the pan drops by 10cm in 45min, determine the rate of heat transfer to the pan. 3 points