Chapter 6, Problem 6.81P

One kg steam expands isentropically from 2.1 MPa and 374 deg C to 93 deg C. Find the final quality of steam.

Two rigid tanks are filled with water. Tank A is 0.2 m³ at 100 kPa, 150°C and tank B is 0.3 m³ at saturated vapor 300 kPa. The tanks are connected by a pipe with a closed valve. We open the valve and let all the water come to a single uniform state while we transfer enough heat to have a final pressure of 300 kPa. Give the two property values that determine the final state and find the heat transfer. B A

ii. Inside the cylinder-piston is water with at-200C. During isothermal process, 550 kJ of heat is transferred to the water. Due to this, some water evaporated. The change of entropy of water during this process.

A flow of 2 kg/s completely dry air at T1, 100 kPa is cooled down to 10°C by spraying liquid water at 10°C, 100 kPa into it so it becomes saturated moist air at 10°C. The process is steady-state with no external heat transfer or work. Find the exit moist air humidity ratio and the flow rate of liquid water. Find also the dry air inlet temperature T1.

An insulated chamber containing 2 L of saturated liquid water at 300 kPa constant pressure. There is a piston-cylinder assembly. One with an electric heater inside the cylinder There is a mixer. Then the water is mixed by the mixer for a while. s mixed, as well as connected to 220 volt electrici supply and 8 A current through neated by the passing heater. This state change at constant pressure 500 kJ of work is done by the mixer. Meanwhile, iquid 90 percent by mass evaporates. a) Plot the state change on T-v and P-v diagrams, paying attention to saturation lines. D) Calculate the operating time of the electric heate

Calculate the workdone, heat transfer and change in entropy.  Do not need to solve.  I just need the  steps to solve it e.g equations etc.

one kg of steam expands isentropically from 2.5mpa and 300 degrees to 0.95mpa.find the final quality and Wn and Ws

Please don't provide handwritten solution ....

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