A piston–cylinder device contains steam that undergoes a reversible thermodynamic cycle. Initially the steam is at 400 kPa and 350C with a volume of 0.3 m3. The steam is first expanded isothermally to 150 kPa, then compressed adiabatically to the initial pressure, and finally compressed at the constant pressure to the initial state. Determine the net work and heat transfer for the cycle after you calculate the work and heat interaction for each process.

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: Steam enters a turbine at 3MPA and 471.245 °C at a rate of 8kg/s and exits at 0.2 MPa and 179.96°C.…

A: Since ypu have asked question with multiple subpart, we will solve the first three subpart for you.…

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

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Q: Refrigerant-134a at 140 kPa and 210C is compressed by an adiabatic 1.3-kW compressor to an exit…

A: In this problem, the initial temperature is greater than the final temperature so it is not…

Q: Steam enters an adiabatic nozzle at 3.5 MPa and 300°C with a low velocity and leaves at 1.6 MPa and…

A:

Q: A rigid, 20-L steam cooker is arranged with a pressure relief valve set to release vapor and…

A: Given data as per the question Volume = 20 L The initial pressure of cooker = 175 kpa initial…

Q: A piston-cylinder assembly contains 3 lb of water vapor, initially at 300F and 20 lbf/in2 is…

A: To find (a) The total work done during the process W. (b) The total change in entropy during the…

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

A: Given Volume of water = 20 L Water vapour pressure P1 = 200kPa Water vapour temperature T1 = 150o C…

Q: Air enters a compressor at ambient conditions of 100 kPa and 20°C at a rate of 6.2 m3 /s with a low…

A: Given Data: The inlet pressure is: P1= 100 kPa The pressure after compression is: P2=900 kPa The…

Q: Refrigerant-134a enters a compressor as a saturated vapor at 160 kPa at a rate of 0.03 m3/s and…

A: (a) The surrounding temperature is given as, The rate of change in entropy of the surrounding is…

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: 3. Water enters an adiabatic steam turbine at 7 MPa and 450 °C at a flow rate of 100 m³/min and…

A:

Q: Steam in an adiabatic turbine expands from 4 MPa and 450°C to 0.1 MPa with a flow rate of 6 kg / s.…

A: Given: Inlet condition of the steam,P1=4MPaT1=450°CExit condition of steam P2=0.1MPaMass flow rate…

Q: Steam enters an adiabatic nozzle at 3.5 MPa and 300°C with a low velocity and leaves at 1.6 MPa and…

A: Answer : Second law efficiency is the ratio of exergy destruction to the exergy at initial state and…

Q: Consider an isothermal expansion of 2 lb/sec of air from 100 psia and 90°F to 15 psia. If the…

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Q: An adiabatic pump is to be used to compress saturated liquid water at 10 kPa to a pressure to 15 MPa…

A: Given: The inlet pressure of the saturated liquid water is P1=10 kPa. The exit pressure of the…

Q: How do the values of the integral ∫ 1 2 δQ/T compare for a reversible and an irreversible process…

A: The given integral is known as Clausius principle. For a reversible process between states 1 and 2,…

Q: Q3: Steam enters an adiabatic turbine at 8 MPa, 550°C, and 15 m/s and leaves at 60 kPa, 150°C, and…

A: At state 1 P1=8MPa T1=550°C C1=13 m/s Using the superheated steam table h1=3521KJ/Kg S1=6.8778…

Q: Determine the change in entropy (BTU/R) in an isothermal process having an initial volume of 6 cu ft…

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Q: An adiabatic diffuser at the inlet of a jet engine increases the pressure of the air that enters the…

A: Find the exit temperature     T2=T1(P2P1)κ-1κ= 30+46020111.4-111.4=581.3 R The Energy balance…

Q: Two rigid tanks are connected by a valve. Tank A is insulated and contains 0.3 m of steam at 400 kPa…

A:

Q: Steam enters an adiabatic turbine at 6 MPa, 6008C, and 80 m/s and leaves at 50 kPa, 1008C, and 140…

A: Given that: for an adiabatic turbine, P1 = 6 MPa, T1 = 600 oC, V1 = 80 m/s P2 = 50 kPa, T2 = 100 oC,…

Q: ir enters an adiabatic nozzle steadily at 345 kPa, 207 oC, and 73 m/s and leaves at 199 kPa and 185…

A: Given:P1=345 KPaT1=207°Cv1=73 m/sP2=199 KPav2=185 m/sA1=135 cm2

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

A:

Q: Air enters an adiabatic nozzle steadily at 302 kPa, 215 oC, and 55 m/s, and leaves at 105 kPa and…

A:

Q: 3. Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25°C with a…

A:

Q: super heated steam enters an adiabatic gas turbine at 12 bar and 500 °C and leaves at 400 Kpa and…

A: To determine the required values in the above question, we must use two concepts:  1. Continuity…

Q: Is the value of the integral ∫ 1 2 δQ/T the same for all reversible processes between states 1 and…

A: No, it is not necessary that for all the reversible processes the integral value of ∫12δQT is the…

Q: 1 kg of air at 700 K and 1.1 MPa in a piston and cylinder devices undergoes a reversible and…

A:

Q: An inventor claims that a new fridge can operate between -15 degree Celsius and 150 degree C while…

A: Given:T2=-15°C =258 KT1=150°C =423 KHeat taken from sink,Q2=2200 WWork input,W=2000 W

Q: Refrigerant-134a enters a compressor as a saturated vapor at 160 kPa at a rate of 0.03 m3 /s and…

A: Compressor inlet          Pressure P1=160 kPa         Volume flow rate V1= 0.03 m3 /s Compressor…

Q: Nitrogen at 825 kPa and 450°C enters a steady-flow nozzle with a low velocity (0.45 m/s) and leaves…

A: Write the given data. Pin=825 kPaTin=450 °Cvin=0.45 m/sPex=125 kPa

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 at 17 °C is compressed steadily in an adiabatic compressor from 100 kPa to 680 kPa. If the…

A: Given: The initial temperature is T1=17°C=(17°C+273) K=290 K, The initial pressure is P1=100 kPa,…

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

A:

Q: An adiabatic open feedwater heater in an electric power plant mixes 0.2 kg/s of steam at 100 kPa and…

A: Given data: The mass flow rate of steam, ms = 0.2 kg/s. The mass flow rate of feed water, mw = 10…

Q: A car engine at 22 degree Celsius and 95 kPa have its air compressed in a reversible and adiabatic…

A:

Q: 2. Refrigerant-134a is to be cooled by water in a condenser. The refrigerant enters the condenser…

A: Given data as per question The mass flow rate of refrigerant in condenser =7 kg/min Calculations…

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: Steam enters a two-stage adiabatic turbine at 8 MPa and 500°C. It expands in the first stage to a…

A: The given values according to the above figure are, State 1: P1=8 MPaT1=500 0C State 2: P2=2…

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: Steam enters an adiabatic turbine steadily at 3 MPa and 400°C and leaves at 50 kPa and 100°C. If the…

A: P1=3 MPa , T1=400oCP2=50 kPa , T2=100oCPower output=2 MW

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.