Water, initially a saturated liquid at 500 kPa, undergoes two reversible processes: 12: isobaric expansion to a saturated vapor 23: an adiabatic process that brings the water to 100°C. a) Draw these processes on a T-s diagram. Clearly indicate each state on your diagram and include arrows for each process. b) What is the quality at state 3? c) What is the change in specific entropy from 1-3?

One kg of air initially at 7 bar pressure and 360 k temperature expands poly tropically (pvL2 = const.) until the pressure reduced to 1.4 bar. Determine: a)Final specific volume and temperature b)Change of internal energy c)Work done and heat interaction. d)Change in entropy.

In a vertical piston cylinder arrangement, there is 300 kPa pressure and 2 kg of saturated liquid and saturated steam mixture water at 70% dryness in the cylinder. As a result of the heat transfer to the cylinder, the piston moves by increasing slowly at constant pressure and the heat transfer ends when the volume increases 2.5 times. a)Find the temperatures, specific volumes and specific internal energies in the initial and final states. b)Draw the P-v diagram of the process schematically, show the initial and final states on the diagram. c)Find the work done to the environment by the system during the process, kj d)Find the heat transfer, kj, to the system during the process.

DRAW THE PV, TS DIAGRAMS AND SOLVE THE FOLLOWING 1. An ideal gas whose mass is 1.36 kg m, R = 204.51 J/kg m and k = 1.6667. Heat added during a reversible nonflow constant pressure change of state is 316.5 kJ. The initial temperature is 37.78 o C. Determine a) change in entropy (kJ/K), b) Work (kJ), c) ratio of expansion or V 2 /V 1. 2. An adiabatic expansion of air occurs through a nozzle (W s = 0) from 850 kPa and 75 o C to 140 kPaa. For an isentropic expansion find: specific volume (m 3 /kg m ), temperature ( o C), and velocity (m/s) at the exit section assuming initial kinetic energy is negligible. (PLS SHOW COMPLETE SOLUTION AND WRITE PROPERLY) (PLEASE ANSWER BOTH QUESTIONS PLEASE)

Three pounds of a perfect gas with R=38 ft.b / (lb.R) and K=1.667 have 300 BTU of heat added during a reversible non flow constant pressure change of state. The initial temperature is 100 ℉. Determine the  a) Final Temperatureb) Change of enthalphyc) Workd) Change of Internal Energye) Change of Entropy

b) A fluid at pressure of 3 bar, and with specific volume 0.18m^ 3 /kg , contained in a cyclinder behind a piston that expands reversibly to a pressure of 0.6 bar according to a law: p = C / (V ^ 2) , where C is a constant. Show the expansion process on p - V diagram and calculate the net work done by the fluid on the piston.

5. "Wet steam" at 200 kPa has 40% of its mass as liquid. The water is contained in a spring-loaded piston-cylinder, with an initial volume of 3 m'. The steam is now heated until its volume is 4.535 m and its pressure is 500 kPa. Determine: a) The final temperature b) c) The work done by the steam The total heat transferred Spring d) Show the process on a P-v diagram Steam

In the Piston-cylinder Assembly, water in the form of hot steam with a mass of 1 kg at a pressure of 500 kPa and a temperature of 500°C is first cooled to a temperature of 120°C in a constant volume, and then condensed by cooling until the water becomes a saturated liquid at a constant temperature.a) draw a T-v diagram of state changesb) find the work done throughout the state changes.c) find the heat transfer from the piston cylinder Assembly to the environment.Note: changes in kinetic and potential energies are negligible.

The water in the form of superheated steam with a mass of 1 kg at a pressure of 500 kPa and a temperature of 500 ° C in the piston-cylinder assembly is first cooled to a temperature of 120 ° C in a fixed volume, and then the water is cooled and condensed at a constant temperature until it becomes a saturated liquid.a) Draw the T-v diagram of the states.b) Find the work done during the state changes.c) Find the heat transfer from the piston and cylinder assembly to the environment.Note: Changes in kinetic and potential energies are negligible.

7: The heat transfer explicitly for the reversible steady flow process 1-2-3-4-5-3 is shown in the figure. a Calculate the total heat transfer in kJ by showing each heat transfer in each process explicitly if the mass of the body is 9 kg. b. If the heat transfer is 83 kJ during the process 3-4-5-3-2, determine the mass of the body. ec) 930 500 200 5 0.1 0.3 0.8 13