A vertical piston–cylinder device initially contains 0.2 m3 of air at 20°C. The mass of the piston is such that it maintains a constant pressure of 300 kPa inside. Now a valve connected to the cylinder is opened, and air is allowed to escape until the volume inside the cylinder is decreased by one-half. Heat transfer takes place during the process so that the temperature of the air in the cylinder remains constant. Determine the amount of air that has left the cylinder.

Q: A frictionless piston–cylinder device contains 5 kg of nitrogen at 100 kPa and 250 K. Nitrogen is…

A: Step 1: The mass of nitrogen is m = 5 kg The initial pressure is P1 = 100 kPa The initial…

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Q: A vertical piston–cylinder device initially contains 0.25 m3 of air at 600 kPa and 300°C. A valve…

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A: A 2009 L tank contains 20 kg of R-134a at 320 KPa. The tank valve is opened until the volume is…

Q: A frictionless piston-cylinder device contains 5 kg of nitrogen at 100 kPa and 250 K. Nitrogen is…

A: Given data:

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Q: A 3000 cm' tank initially contains compressed air at 600 kPag and 28 °C. Determine the mass of air…

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Q: Air is contained in a piston-cylinder device at 600 kPa and 927°C, and occupies a volume of 0.8 m².…

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Q: Steam at 75 kPa and 8 percent quality is contained in a spring-loaded piston–cylinder device, with…

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Q: The work required to compress 5 kg of air in an insulated cylinder from 200°C and 300 kPa to 800 kPa…

A: Write the given data. m=5 kgT=200 °C=473 KP1=300 kPaP2=800 kPa

Q: A frictionless piston–cylinder device contains 16 lbm of superheated water vapor at 40 psia and…

A:

Q: Steam flows steadily through a turbine at a rate of 45,000 lbm/h, entering at 1000 psia and 900°F…

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A:

Q: Q9/ A piston-cylinder device contains 0.85 kg of refrigerant- 134a at 10°C. The piston that is free…

A: The final  pressure is given as : P1=Patm+WAW=mgA=π4d2d=25 cm = 0.25 mA=0.049 m2m= 12…

Q: A closed, flexible container initially contains 1 kg of saturated liquid water at a temperature of…

A: Write the given data: m=1 kgT1=270 °C=270+273(K)=543 KV2=1 m3 Note from the property table the…

Q: During an expansion process, the pressure of a gas changes from 15 to 100 psia according to the…

A: The initial pressure is given as,   Pi=15 psia   The initial volume is given as,   Vi=7 ft3   The…

Q: A rigid vessel contains 5.0 kg of wet steam at 0.4 MPa. After the addition of 9585 kJ the steam has…

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Q: A liquid R-134a bottle has an internal volume of 0.0018 m^3 initially, it contains 0.88 kg of R-134a…

A:

Q: A rigid vessel contains 5 kg of wet steam at 0.4 Mpa. After the addition of 9,585 J the steam has a…

A: Given data: The mass of the wet steam is (m)= 5 kg The initial pressure of the wet steam is (P1) =…

Q: The radiator of a steam heating system has a volume of 20 L and is filled with superheated water…

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Q: 27.745 kg per second of water at 0.03398675 kbarg and internal energy of 15000 kW is heated at…

A:

Q: A room is filled with saturated steam at 100°C with enthalpy of 2675.6 kJ/kg. Now a 5-kg bowling…

A: Given data: m=5 kgTi=25°CTf=100°CCp=1.8 kJ/kg°Chfg=2675.6 kJ/kg Need to determine the mass of steam…

Q: A 5-ft3 rigid tank initially contains refrigerant-134a at 60 psia and 100 percent quality. The tank…

A: Subscript 1 is used for the initial properties inside the tank, subscript 2 is used for the final…

Q: A 2-ft3 rigid tank contains saturated refrigerant- 134a at 160 psia. Initially, 5 percent of the…

A: Write the given information. Write the properties of R134a at 160 Psi.

Q: A piston-cylinder device initially contains 0.07 m' of nitrogen gas at 130 kPa and 120°C. The…

A: The boundary work done during the process is 1.86 kJ.

Q: One kg of air at 200 kPa and 127°C is contained in a piston–cylinder device. Air is now allowed to…

A: Given: The mass of the air is m=1 kg. The temperature of the air is T=127°C. The initial pressure of…

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

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Q: A piston–cylinder device contains 0.85 kg of refrigerant134a at –10°C. The piston that is free to…

A: Given Data Mass of refrigerant-134a ,m= 0.85Kg mass of piston, M=12Kg Diameter of piston, D=25cm…

Q: A mass of 10 g of oxygen fill a weighted piston– cylinder device at 20 kPa and 100°C. The device is…

A: Given: The mass of the oxygen is m=10 g. The initial pressure and temperature of the cylinder are…

Q: Liquid water at 200 kPa and 20 degress celcius is heated in a chamber by mixing it with superheated…

A: Draw the schematic diagram of the mixing chamber as shown in Figure (1).

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A:

Q: Calculate the work done when a gas expands from 350 kPa and 0.03 m3 to a final volume of 0.2 m3 for…

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Q: A balloon initially contains 65 m3 of helium gas at atmospheric conditions of 100kPa and 22°C. The…

A: Given Data:    V1=65m3                  PR=P2=150kpa    P1=100 kpa              T2=(?)    T1=22°C

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 frictionless piston-cylinder device contains 2 kg of nitrogen at 100 kPa and 300 K. Nitrogen is…

A:

Q: A piston–cylinder device initially contains 0.6 kg of steam with a volume of 0.1 m3 . The mass of…

A: Given, a piston- cylinder device with the following data. Initial Volume of steam, V1=0.1m3 Mass of…

Q: A rigid tank contains 5 kg of refrigerant-134a initially at 20°C and 140 kPa. The refrigerant is now…

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A:

Q: A 200-m3 rigid tank contains compressed air at 1 MPa and 300 K. Determine how much work can be…

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 nitrogen gas is P1=80 kPa. The final pressure of nitrogen gas is…

Q: A 0.04-m3 tank initially contains air at ambient conditions of 100 kPa and 22°C. Now, a 17-L tank…

A: Given that, Volume of air, v=0.04 m3,Pressure at ambient condition, P=100 kPa,Temperature at ambient…

Q: A student living in a 4 - m 5 - m 3 - m dormitory room turns on her 100 - W fan before she leaves…

A: Given, V = 4 m × 5 m × 3 m = 60 m3W˙= 100 Wt = 8 h = ( 8 × 3600) sP1 = 100 kPaT1 = 20 °C = 293 K…

Q: A 12-ft3 rigid tank contains refrigerant-134a at 30 psia and 55 percent quality. Heat is transferred…

A: Given Data⇒volume of tank=12 ft3P1=30 Psiax1=0.55P2=50 Psia In solutions there is no heat loss from…

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Q: A 1-m tank containing air at 10°C and 350 kPa is connected through a valve to another tank…

A:

Q: Initially, 200 L of saturated vapor refrigerant-134a in a piston. The piston is free to move, and…

A:

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.