The air in an insulated, rigid compressed-air tank whose volume is 0.5 m3 is initially at 2400 kPa and 20°C. Enough air is now released from the tank to reduce the pressure to 2000 kPa. Following this release, what is the temperature of the remaining air in the tank? The gas constant of air is 0.287 kPa·m3/kg·K. The specific heats of air at room temperature are cp = 1.005 kJ/kg·K and cv = 0.718 kJ/kg·K.

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A: Given:The mass of the helium gas is m=0.6 kg.The initial pressure of the helium gas is P1=100…

Q: Q2/ A 1-m² tank containing air at 25°C and 500 kPa is connected through a valve to another tank…

A: Given: Volume of tank 1 V1=1m3Temperature of air in tank 1 T1=25°C or 298KPressure if the air in…

Q: L Steam flows steadily into a turbine with a mass flow rate of 20 kg/s at 6 MPa and 600°C with a…

A:

Q: In a production facility, 1.2-in-thick, 2-ft × 2-ft square brass plates (ρ = 532.5 lbm/ft3 and cp =…

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Q: A compressor operating with 7.7 kg/s water vapour with a compression ratio (P2/P1) equal to 3.0 is…

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Q: A mass of 8 kg of helium undergoes a process from an initial state of 3.9 m³/kg and 15°C to a final…

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Q: NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to…

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Q: Liquid water at 100 kPa and 25°C is heated in a chamber by mixing it with superheated steam at 100…

A: Givent1=25°Ct2=300°Ct3=75°CP1=100kpaP2=100kpaP3=100Kpam˙1=3.44kg/sm˙2=?Q=2100j/min

Q: There is 1.13 kg of gas, for which R = 425 J/kg.K and k = 1.21, that undergo a non-flow isometric…

A: Dear student, here the unit of heat must be in kJ. It should not be in kJ/s. Because there is no…

Q: In a reciprocating compressor 0.1 m3 of air at 0.95 bar and 32 o C is compressed according to PVn…

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Q: In a production facility, 1.2-in-thick, 2-ft × 2-ft square brass plates (ρ = 532.5 lbm/ft3 and cp =…

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Q: Steam enters an adiabatic turbine at 8 MPa and 500°C at a rate of 3.1 kg/s and leaves at 10 kPa. If…

A: P1 = 8 MPaT1 = 500°C P2 = 10 kPa m = 3.1 kg/sW = 2.5 MW = 2.5 x 103 kWT2 =?

Q: The volume of 1 kg of helium in a piston-cylinder device is initially 5 m³. Now helium is compressed…

A: Given:The mass of the helium, (m)=1 kg.The initial volume of the helium, ()=5 m3The final volume of…

Q: A 0.5m³ rigid tank containing hydrogen at 20°C and 600 kPa is connected by a valve to another 0.5m³…

A: given : VA = 0.5 m3 TA = 20⁰C = 293 K PA = 600 kPa   VB = 0.5 m3 TB = 30 ⁰C = 303 K PB = 150 kPa…

Q: Refrigerant 134-a enters a compressor as saturated vapor at -20°C and leaves at 1.2 MPa and 80°C.…

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Q: A rigid tank initially contains 0.9 kg of water. Then it is filled more with steam from a supply…

A: Given: Mass of water mw=0.9kg Final mass of the tank m=2kg Pressure of steam supplied P1=1.5MPa…

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Q: Argon is expanded in an adiabatic turbine from 2 MPa and 500°C to 200 kPa. When maximum work is…

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Q: A rigid tank is divided into two equal parts by a partition. One part of the tank contains 1.5 kg of…

A: Here we will refer to the steam table to get the values of specific volume and entropy at the…

Q: Consider a closed, isolated system that consists of two substances 1 and 2 that both have constant…

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Q: NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to…

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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:

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Q: Refrigerant-134a enters the compressor of a refrigeration system as saturated vapor at 0.14 MPa and…

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Q: Steam enters a turbine at 6 MPa and 450°C at a rate of 33 kg/s and exits at 50 kPa as saturated…

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Q: In an open system, 500 kg/h of air is being compressed from 100 kPa at  280 K to 600 kPa and 400 K.…

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Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 17-kW compressor. Determine the mass…

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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: Consider a sealed, rigid container of 10 kg of water vapor at 25°C and 80 kPa. A paddle wheel with a…

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Q: An ideal free piston-cylinder with an initial volume of 0.5500 m³ contains 19.00 kg of refrigerant…

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Q: A rigid, well-insulated tank is initially empty. The tank is kept connected by means of a valve to a…

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Q: A water stream at 1 MPa and 160°C is mixed with another stream at 1 MPa and 300°C. If the mass flow…

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Q: Water is heated with the aid of a diesel furnace. 2kg of diesel fuel is required for every 300…

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Q: Helium gas enters an adiabatic nozzle at 37 psia and 790 R with an initial velocity of 9 ft/s. The…

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Q: A mixing chamber receives water at 200 kPa and 30°C at a rate of 1.8 kg/s. This water is mixed with…

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Q: A 0.08-m rigid tank initially contains saturated water vapor at 180 °C. The tank is connected by a…

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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.