R-134a contained in a piston cylinder is to be condensed to a saturated liquid at constant pressure in a quasi-equilibrium process from an initial state of 1000 kPa and 180°C, where heat is exchanged with a thermal reservoir at 100°C. Determine if this process is possible. At what quality of R-134a will the process proceed reversibly?

Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 0.5-kW compressor to an exit…

A: Given Data: Refrigerant type: R-134a The temperature of refrigerant at the entry of compressor is T1…

Q: A 5 L of saturated liquid water at a constant pressure of 150 kPa is contain in an insulated…

A:

Q: 3. Steam enters an adiabatic turbine at 4MPA and 350°C and expands to 75 kPa with an isentropic…

A:

Q: Steam at 1MPa and 554.8726 °C enters an insulated turbine and exits as saturated vapor at 20 kPa.…

A:

Q: Steam at 1000 kPa, a temperature of 300°C, and a velocity of 50 m/s. The steam leaves the turbine at…

A:

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: Given: The initial pressure of the nitrogen gas in the compressor is P1=80 kPa The final pressure of…

Q: Air is compressed in a piston–cylinder device from 90 kPa and 20°C to 600 kPa in a reversible…

A: Given: The initial pressure of the air before compression is P1=90 kPa. The final pressure of the…

Q: The inner and outer surfaces of a 4-m × 10-m brick wall of thickness 20 cm are maintained at…

A: Given: The inner surface temperature of the brick wall is T1 = 16 °C. The outer surface temperature…

Q: Water at 20 psia and 50F enters a mixing chamber at a rate of 300 lbm/min where it is mixed steadily…

A: There are two inlets and an outlet in the mixing chamber of the system. As the mass crosses the…

Q: Steam enters an adiabatic turbine at 10 MPa and 400°C with a mass flow rate of 4.5 kg/s and leaves…

A:

Q: Argon gas enters an adiabatic turbine at 1350°F and 200 psia at a rate of 40 lbm/min and exhausts at…

A: Given data The gas enter at the turbine is T1=1350 F. The gas pressure at the turbine is P1=200…

Q: Steam enters an adiabatic turbine at 8 MPa and 500°C at a rate of 3 kg/s and leaves at 20 kPa. If…

A: Given, P1 = 8 MPa T1 = 500°C  P2 = 20 kPa = 0.02 MPa m = 3 kg/s W = 2.5 MW = 2.5 x 103 kW T2 =?

Q: An insulated rigid tank contains 4 kg of argon gas at 450 kPa and 30°C. A valve is now opened, and…

A: Given: The initial pressure of the argon gas is P1=450 kPa. The final pressure of the argon gas is…

Q: Steam expands in a turbine steadily at a rate of 40,000 kg/h, entering at 8 MPa and 500°C and…

A: Given: The steam mass flow rate is m=40000 kg/h. The pressure and temperature at the turbine inlet…

Q: An insulated piston–cylinder device contains 0.05 m3 of saturated refrigerant- 134a vapor at 0.8-MPa…

A: Givan data, P1 = 0.8 MPa P2 = 0.4 MPa V1 = 0.05 m3 It is given in question that the expansion…

Q: Steam enters an adiabatic turbine steadily at 5 MPa and 500 °C and leaves at 100 kPa and 200 °C. The…

A:

Q: Saturated water vapor at 150°C is compressed in a reversible steady-flow device to 1000 kPa while…

A: Write the properties of water at a given saturation condition.

Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 0.5-kW compressor to an exit…

A:

Q: Twokg of saturated water vapor at 600 kPa are contained in a piston–cylinder device. The water…

A: The data given is, mass, m = 2 kg Initial pressure, P1 = 600 kPa Final pressure, P2 = 100 kPa Work…

Q: A 0.68 m3 rigid tank contains refrigerant-134a initially at 100 kPa and 40 percent quality. Heat is…

A:

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: The mass flow rate can be found from the compressor power and the work of compression as follows:

Q: Steam enters an adiabatic turbine at 5 MPa, 650C, and 80 m/s and leaves at 50 kPa, 1508C, and 140…

A: Given data: Inlet pressure, P1 = 5 MPa Inlet temperature, T1 = 650°C Inlet velocity, V1 = 80 m/s…

Q: Steam expands in a turbine steadily at a rate of 18,000 kg/h, entering at 7 MPa and 600°C and…

A: Given: mass flow rate(m) =18000 kg/h = 5kg/sP1=7MPa =7×106 PaT1=600°C=873 KP2=50 kPaSurrounding…

Q: R-134a contained in a piston cylinder is to be condensed to a saturated liquid at constant pressure…

A:

Q: Steam enters an adiabatic turbine at 5 MPa, 650 °C, and 80 m/s and leaves at 50 kPa, 150 °C, and 140…

A:

Q: A mass of 25 lbm of helium undergoes a process from an initial state of 50 ft3 /lbm and 60°F to a…

A: Given, mass of helium ( m ) = 25 lbm T1 = 60°F = 520°R T2 = 240°F = 700°R Specific volume (v1) = 50…

Q: Ten lbm of R-134a is expanded without any heat transfer in a closed system from 120 psia and 100°F…

A: Given Data  Properties of R-134a (table) At state 1 ( Before isentropic process) P1=120 psia…

Q: On a P-v diagram, what does the area under the process curve represent?

A: In the P-V diagram, the area under the process curve represents the work done by the gas.

Q: 2 mol of an ideal gas expands from 1 L to 10 L reversibly and isothermally at 250 K. The work done…

A: A thermodynamic process in which energy transfer takes place while keeping the temperature as…

Q: Air is compressed in a car engine from 22°C and 95 kPa in a reversible and adiabatic manner. If the…

A:

Q: Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming…

A: Write the values of the enthalpy, pressure ratio, at the initial temperature 27oC from the…

Q: A piston is inserted into a cylinder causing the pressure in the air to change from 50 to 4000 kPa…

A:

Q: Refrigerant-134a at 320 kPa and 40°C undergoes an isothermal process in a closed system until its…

A: Express the energy balance equation for closed system . Ein-Eout=∆Esystem Here, energy transfer into…

Q: A 0.05-m3 rigid tank initially contains refrigerant134a at 0.8 MPa and 100 percent quality. The tank…

A: At state 1 (Refrigerant-134a table) 0.8Mpa  v1=0.025645 m3/Kg   At state 2 1.2Mpa v2=0.0008935 m3/Kg…

Q: Steam at 3 MPa and 400°C is expanded to 30 kPa in an adiabatic turbine with an isentropic efficiency…

A: Work done can be determined by using Steady flow energy equation Values from steam table at given…

Q: Helium gas is compressed from 90 kPa and 30°C to 450 kPa in a reversible, adiabatic process.…

A:

Q: Air is compressed by an adiabatic compressor from 100 kPa and 12°C to a pressure of 800 kPa at a…

A: At state 1 P1=100Kpa T1=12°C At state 2 P2=800Kpa T2=?

Q: Carbon dioxide is compressed in a reversible, isothermal process from 100 kPa and 20°C to 400 kPa…

A: Given data: The initial pressure is Pi = 100 kPa. The final pressure is  Pf = 400 kPa. The…

Q: Consider steady heat transfer through a 5-m × 7-m brick wall of a house of thickness 30 cm. On a day…

A: Sgen=Sout-SinSgen=(QT)out-(QT)in Sgen=1035273+5-1035273+20Sgen=3.72302158-3.53242321Sgen=0.19 W/K

Q: Is it possible to expand water at 30 psia and 70 percent quality to 10 psia in a closed system…

A: Find out the initial entropy of the water S1=Sliq30+xSevap30 S1=0.36821+0.7(1.33132) S1=1.30013…

Q: piston–cylinder device contains 1.2 kg of nitrogen gas at 120 kPa and 27°C. a) The gas is now…

A:

Q: A mass of 8 kg of helium undergoes a process from an initial state of 3 m3 /kg and 15°C to a final…

A: Given Data⇒mass of helium=8kgV1=3m3kgT1=288 KV2=0.5m3kgT2=353 KP0=100 KPaT0=298 KWe need to…

Q: 6. An insulated piston-cylinder device contains 0.05 m3 of saturated refrigerant- 134a vapor at…

A: