A 3000 cm 3 tank initially contains compressed air at 600 kPag and 28 o C. Determine the mass of air to be withdrawn from the tank to reduce its pressure to 80 kPag while the temperature remains unchanged.

Q: Q2: Air in A frictionless piston-cylinder device is compressed slowly according to the relation…

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Q: A 3000 cm3 tank initially contains compressed air at 600 kPag and 28 0C. Determine the mass of air…

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Q: Consider 2 kg of air has a decrease of internal energy of 25 kJ while its Celsius temperature is…

A: Given data,  m= 2kg,  ΔU = -25 kJ (decreases , so taken as negative)  If T1 is the initial…

Q: A 4-L pressure cooker has an operating pressure of 175 kPa. Initially, one-half of the volume is…

A: Consider this system as a control volume system. The energy associated with the fluid is internal…

Q: Determine

A: To find : The decrease in temperature during the process and the specific volume  Given :  initial…

Q: Air is cooled during an isobaric process at 6.97 atm from an initial specific volume of 1.02 m³/kg…

A:

Q: A 10-kg air is compressed isothermally from 1 atm and 30ºC. If 150 Btu of heat lost by the system,…

A: Given Data: Mass of the air, m=10-kg Initial pressure, P1=1 atm Heat lost, Q=-150 Btu

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

A: Given data:

Q: A rigid tank containing 0.4m3 of air at 400 kPa and 30oC is connected by a valve to a piston…

A: Given   Volume, V1 =0.4m3  Pressure, P1 = 400 kPa                P2 = 200 kPa Find   Heat transfer,…

Q: A 5.2m3 tank contains nitrogen, which is evacuated from 100kPag to a pressure of 98kPag vacuum.…

A: Answer: The mass of pumped out nitrogen is 6.3274 kg.  Hence, the correct answer is option (a).

Q: For constant-volume systems, the total actual and useful works are identical (Wu = W).

A: For constant-volume systems,

Q: Steam is contained in a 4-L volume at a pressure of 1.5 MPa and a temperature of 400 C. If the…

A:

Q: A rigid tank contains 40 lbm of air at 20 psia and 70°F. More air is added to the tank until the…

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Q: The state of liquid water is changed from 50 psia and 50°F to 2000 psia and 100°F. Determine the…

A: Given Initial pressure Pi = 50 psia Initial temperature Ti = 50o F Final pressure Pf = 2000 psia…

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

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Q: cb9 • 03.031 Ten (10) kg of R-134a fill a 1.115 m³ rigid container at a initial temperature of -30…

A:

Q: A 3000 cm3 tank initially contains compressed air at 600 kPag and 28 oC. Determine the mass of air…

A: Given data: Temperature of the air remains constant

Q: A 1 m^ 3 rigid tank contains hydrogen at 250 kPa and 420 K. The gas is now cooled until its…

A: The answer is given below

Q: A rigid vessel contains contain 5 kg of wet steam at 0.4 MPa. After the addition of 9858 kJ, the…

A:

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

A: Given data:m=5kgP1=0.4 MPa             Rigid vesselFind:a) Intevinal energy v1=?b) sp volume = ?Q…

Q: A 0.75-m3rigid tank initially contains air whose density is 1.18 kg/m3 The tank is connected to a…

A: Given: The volume of the rigid tank is V=0.75 m3. The initial density of the air in the tank is…

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: An ideal gas is compressed isothermally from 100 kPa to 170 kPa. The percent increase in the density…

A: Given: The initial pressure of a gas, P1 = 100 kPa The final pressure of gas, P2 = 170 kPa

Q: A scuba diver’s 2-ft3 air tank is to be filled with air from a compressed air line at 120 psia and…

A: Given data, From mass balance equation, From energy balancing equation,

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

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Q: A 300-m3 rigid tank is filled with saturated liquid-vapor mixture of water at 178 kPa. If 25 percent…

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Q: 17. 1m3 of air is heated at constant pressure from 15 to 300C, and is then cooled at constant volume

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Q: A rigid tank contains 20 lbm of air at 20 psia and 70°F. More air is added to the tank until the…

A: Given: The initial mass of the air is m1=20 lbm. The initial pressure of the air is P1=20 psia. The…

Q: A 2-m3 rigid tank initially contains air whose density is 1.18 kg/m3 . The tank is connected to a…

A: Given: The volume of the rigid tank is V=2 m3. The initial density of the air is ρ1=1.18 kg/m3. The…

Q: 4. Air is compressed polytropically so that the quantity PV14 is constant. If 0.02 m³ of air at…

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Q: A well insulated 70 m³ tank initially contains 23000 kg of water distributed between liquid and…

A: Write down the given values with suitable variables.

Q: 100-kg of R-134a at 200 kPa are contained in a pistoncylinder device whose volume is 12.322 m3. The…

A:

Q: Q3/A piston-cylinder contains air at 150Kpa and 400 C after cool air to temperature of 20 C.…

A:

Q: 0.2 m^3 of an ideal gas at a pressure of 2Mpa and 600 k is expanded isothermally to 5 times the…

A: initial volume, v1=0.2 m3P1=2 MPaT1=600 Kv2=5v1v3=v2=5v1T3=300 K

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

A:

Q: A rigid vessel contains 5 kg of wet steam at 0.4 MPa. After the addition of 9585 kJ the steam has a…

A:

Q: 10-kg of R-134a at 300 kPa fills a rigid container whose volume is 14 L. Determine the temperature…

A: Given data: *The mass of the refrigerant is m=10 kg. *The initial pressure of the container is…

Q: Determine the quality of steam at 143.27 kPa after a loss of  270 kJ/kg from the saturated steam…

A:

Q: a rigid vessel contains 5 kg of wet steam at 0.4 mPa. After the addition of 9585 kJ the steam has a…

A: Note: As the "saturated water: pressure" table itself starts at 1 kPa, we assume the given pressures…

Q: A rigid tank contains 35 lbm of air at 20 psia and 70 F. More air is added to the tank until the…

A: m1=mass of air at begining in a rigid tank ;m1=35 lbm ;P1=Pressure of air at begining in a rigid…

Q: Determine the enthalpy of liquid water at 100°C and 15 MPa (a) by using compressed liquid tables,…

A: Given: The value of temperature is T=100 ⁰C. The value of pressure is P=15 MPa. Part (a) Refer the…

Q: Ab.5 m³ rigid tank contains refrigerant-134a initially at 200 kPa and 40 percent quality. Heat is…

A: To solve this question we have required refrigeration table of R134a,At P1=200 kPa,specific volume…

Q: Determine the specific volume, internal energy and enthalpy of compressed liquid at 120 °C and…

A: Compressed Liquid

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…

Q: A piston–cylinder device initially contains 15 ft3 of helium gas at 25 psia and 70°F. Helium is now…

A: Given Data⇒Volume V1=15 ft3P1=25 PsiaT1=70°F=531 KPolytropic processPvn=cP2=70 PsiaT2=300°F=761…

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.