A piston-cylinder device contains 0.5 kg of air initially at 3 MPa and 250°C. The air is first expanded at the constant pressure to 0.04 m3, then compressed isothermally to the initial volume, and finally compressed isometrically to the initial state. 1. Draw the P-V diagram. 2. Determine the boundary work for each process and the net work of the cycle. 3. Heat lost

Q: A 3 kg of air at 150 kPa and 10°C is contained in a gas-tight, frictionless piston-cylinder device.…

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Q: Q 3) Steam enters an adiabatic turbine at 6 MPa and 500°C at a rate of 3 kg/s and leaves at 25 kPa.…

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

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Q: Q2) A piston-cylinder device initially contains 0.5 kg of air at 1 MPa and 400°C. The air is first…

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Q: Q2) A piston-cylinder device initially contains 0.5 kg of air at 1 MPa and 400°C. The air is first…

A: First, we will draw the PV diagram (as shown below),   P1V1=mRT1  1000 * V1 = 0.5 * 8.314 * 673  V1…

Q: 6- A mass of 1.2 kg of air at 150 kPa and 12 C is contained in a piston- cylinder device. The air…

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Q: A piston-cylinder device contains 0.35 kg of air initially at 2423 kPa and 321 oC. The air is first…

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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 data as per question mass of helium = 25 lbm

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

A: Given data: The refrigerant inside the cylinder is R-134a The volume present inside the cylinder is…

Q: A piston-cylinder device contains 0.3 kg of air initially at 2 MPa and 327 °C. The air is first…

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Q: 6. 2 kg/sec of air has a decrease of internal energy of 25 KJ while its Centigrade temperature is…

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Q: Two 10-ft adiabatic tanks are connected by a valve. Initially, one tank contains water at 450 psia…

A: Given Data Volume of each tank=10 ft³ Tank A:450 psia,x=0.1 Tank B:15 psia, x=0.75

Q: A well-insulated 4-m × 4-m × 5-m room initially at 10°C is heated by the radiator of a steam heating…

A: Step-1 The dimension of room is: 4m X 4m X 5m. The initial temperature of the room is: T0 = 10 °C.…

Q: An insulated piston-cylinder device contains 100L of air at 400 kPa and 25°C. A paddle wheel within…

A: Given data as per question Volume = 100L =0.1 m3 Pressure = 400 Kpa Temperature  = 250 c Work done =…

Q: A well-insulated 4-m × 4-m × 5-m room initially at 10°C is heated by the radiator of a steam heating…

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Q: 2-kg of air (as an ideal gas) is compressed in an adiabatic compressor from an initial state of 100…

A: Given Data State 1: 100 kPa, 300 K State 2: 200 kPa, 600 K m=2 kg

Q: 1) A piston-cylinder device contains 0.3 kg of air initially at 1.8 MPa and 350°C. The air is first…

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Q: Onekg of R-134a initially at 600 kPa and 25°C undergoes a process during which the entropy is kept…

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Q: A piston–cylinder device contains superheated steam. During an actual adiabatic process, the entropy…

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Q: A piston–cylinder device with a set of stops initially contains 1.5 moles of gas at 1.00 MPa and…

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Q: What will be change in entropy of the system if a piston-cylinder arrangement contains 0.06 m³ of…

A: Data given -  V1 = 0.06 m3  P1 = 1 bar  T1 = 295 K  Isothermally  P2 = 6 bar

Q: A piston–cylinder device contains 5 kg of saturated water vapor at 3 MPa. Now heat is rejected from…

A: Given Data: The mass of the saturated water vapor is M= 5 kg. The pressure is P = 3 MPa. The…

Q: A well insulated piston cylinder device contains 2 kg of steam at 800 kPa and 40% quality. The steam…

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Q: A well-insulated 4-m * 4-m * 5-m room initially at 10C is heated by the radiator of a steam-heating…

A: given data: The volume of the room V1= 4 m x 4 m x 5 m The initial temperature of air in the room,…

Q: Thermodynamic problem. Determine the work necessary to compress a gas from an initial volume VI=90L…

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Q: An adiabatic piston-cylinder device equipped with a spring maintains the pressure inside at 300 kPa,…

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Q: Air is compressed by a 40-kW compressor from P1 to P2. The air temperature is maintained constant at…

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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: A 0.55-ft3 well-insulated rigid can initially contains refrigerant-134a at 90 psia and 30°F. Now a…

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Q: fluid is heated from 125 degrees Fahrenheit to 225 degrees Fahrenheit. Consider an ideal gas with…

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Q: A rigid tank is divided into two equal parts by a partition. One part of the tank contains 5.5 kg of…

A: Here, the mass of the compressed liquid water in first part of the tank (where the compressed liquid…

Q: A piston-cylinder device contains 13 kg of refrigerant-134a at 750 kPa and 70 ∘C. The refrigerant is…

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Q: Q.) A piston-cylinder device initially contains 0.5 kg of air at 1 MPa and 400°C. The air is first…

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Q: The piston/cylinder contains carbon dioxide at 300 kPa, with a volume of 0.2 m3 and at 100°C. Mass…

A: Given: T1 = 100 deg C T2 = 200 deg C  P1 = 300 kPa  V1 = 0.2 m3   Correct answer: B) -80.4 kJ

Q: A well-insulated 4-m × 4-m × 5-m room initially at 10°C is heated by the radiator of a steam heating…

A: Given data T1=10°cV=15 LP1=200 KPaWfan=120 WP2=100 kPa

Q: A piston-cylinder device initially contains 0.15 kg of air initially at 2 MPa and 350℃. The air…

A: Question is to find the boundary work for each process and net work of the cycle.The cyclic process…

Q: Q:) A piston-cylinder device initially contains 0.5 kg of air at 1 MPa and 400°C. The air is first…

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Q: A piston-cylinder device initially contains air at 150 kPa and 27 ° C. At this state, the piston is…

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Q: Q2) A piston-cylinder device initially contains 0.5 kg of air at 1 MPa and 400°C. The air is first…

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Q: An air compressor takes in air at 30 °C and 100 kPa and then compressed adiabatically until its…

A: Step 1: Given data: The temperature of air at the inlet of compressor T=30°C=30°C+273 K=303 K.…

Q: Two rigid tanks are connected by a valve. Tank A contains 0.2 m3 of water at 400 kPa and 80 percent…

A: Given Tank A Volume = 0.2 m3 Pressure = 400 kPa Quality = 80% = 0.8 Tank B Volume = 0.5 m3 Pressure…

Q: A rigid vessel contain 5kg of wet steam at 0.4Mpa. After the addition of 9585KJ the steam has a…

A: According to the information we have 5kg of moist steam at 0.4Mpa is contained in a rigid vessel.…

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

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Q: A piston-cylinder device contains 0.15 kg of air initially at 2 MPa and 350°C. The air is first…

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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.