Steam enters a turbine at 600°C and 6000 kPa, and leaves the turbine as saturated vapor at 200 kPa. Heat is transferred from the turbine to the surroundings in the amount of 30 kJ per kilogram of steam flowing through the turbine. The mass flow rate of steam through the turbine is 20 kg/s. Determine the rate of work done by the steam in the turbine, in kW.

Q: A frictionless piston-cylinder device contains a gas initially at 0.8 MPa and 0.015 m³ .It expands…

A: Given:Initial pressure, P1=0.8 MPa or 800 kPaInitial volume, V1=0.015 m3Final Volume, V2=0.03 m3

Q: A fluid enters a machine at 162.8 m/s, 783.45 kPa, and with a specific volume of 0.463 m°/kg. The…

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Q: One kilogram of gas is contained in a piston-cylinder apparatus. The gas is then heated with 78.2 kJ…

A: Mass of bass = 1 kg Heat supplied= 78.2 kj Shaft work to the gas = 18.5 kj Specific internal energy…

Q: Consider a classroom that is losing heat to the outdoors at a rate of 12,000 kJ/h. If there are 40…

A: Given, Qout = 12,000 kJ/h = 12,000/(3600) kJ/Sec = 3.33 kJ/Sec= 3.3 kW Heat Generated by…

Q: 7- A piston cylinder device contains 5 kg of water at 150 kPa and 25°C. The cross-sectional area of…

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Q: A mass of 15 kg of air in a piston–cylinder device is heated from 25 to 95°C by passing current…

A: The flow of electricity is considered as the work done on the system. The enthalpy change of the gas…

Q: A fluid enters a machine at 169.7 m/s, 874.09 kPa, and with a specific volume of 0.277 m³/kg. The…

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Q: A piston cylinder contains 0.64 kg of air initially at 450 kPa and 225 °C, now the air expands in a…

A: Given Data  Mass of the air, m=0.64Kg T1=225°C T2=25°C P1=450 KPa P2=100 KPa.…

Q: A fluid enters a machine at 187.91 m/s, 792 kPa, and with a specific volume of 0.111 m³/kg. The…

A: For solution refer below images.

Q: If the steam undergoes a process under Pv1.319 = C, and the work steady flow is found to be 372.75…

A: Given data, Pv1.319 = C  Here n= 1.319 , and process is polytropic,  When the flow is steady - W=…

Q: The average specific heat of the human body is 3.6 kJ/kg·°C. If the body temperature of an 80-kg man…

A: Given data :C=3.6 KJ/kg C°M=80 kgT1=37°CT2=39°C

Q: Air enters the 1-m2 inlet of an aircraft engine at 100 kPa and 20°C with a velocity of 180 m/s.…

A: Given: The inlet area of an aircraft engine is A1=1 m2 The inlet pressure of the air in an aircraft…

Q: A closed system containing a gas undergoes a reversible process from 600 kPaa and a volume of 0.15…

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Q: A closed system containing a gas undergoes a reversible process from 600 kPa and a volume of 0.15 m3…

A: Write the given values with the suitable variables. P1=600 kPaV1=0.15 m3V2=0.50 m3γ=1.4 Here, P1,…

Q: A fluid enters a machine at 152.41 m/s, 838.17 kPa, and with a specific volume of 0.128 m3/kg. The…

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Q: enters an expander with an enthalpy of 1200 kj/kg and leaves with an enthalpy of 899 kJ/kg. 20 kJ/kg…

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Q: Refrigerant-134a at 320 kPa and 40°C undergoes an isothermal process in a closed system until its…

A: To find :  The required magnitude of work  Given :  The pressure is  P1=320 kPa, The Temperature is…

Q: Steam flows through a turbine at a rate of 2.0 kg/s, at 3 MPa and 450°C with a velocity of 80 mis…

A: given; mass flow rate (m)=2kg/sinlet pressure(P1)=3MPainlet temperature(T1)=4500cinitial…

Q: A piston-cylinder receives an eight kg of steam with an inlet pressure of 0.5 MPa and an inlet…

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Q: The air is compressed in a compressor. Before compression, the pressure and specific volume of air…

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Q: A cylinder with a moveable piston holds 0.17 lbm of hydrogen initially with a volume of 1.35 ft³ at…

A: Given data: m=0.17 lbm=0.07711 kgV1=1.35 ft3=0.0382277 m3T=1336°F=997.5944 KV2=2.73 ft3=0.077305 m3…

Q: Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 3008C and 200…

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Q: HW5: A 20-m3 tank contains nitrogen at 25°C and 800 kPa. Some nitrogen is allowed to escape until…

A: Given Data- Initial properties P1=800KPa ,T1=25'C , V1=20m3 Final Properties P2=600KPa , T2=20'C ,…

Q: Steam flows through a turbine at a rate of 2.3 kg/s, at 3.2 MPa and 480°C with a velocity of 85 m/s…

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Q: A fluid at 700 kPa, with a specific volume of 0.25 m3/kg and a velocity of 175 m/s, enters a device.…

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Q: A fluid enters a machine at 164.41 m/s, 889.14 kPa, and with a specific volume of 0.342 m³/kg. The…

A: Answer: The work done by the fluid is 1206.835 kJ.

Q: A fluid at 700 kPaa, with a specific volume of 0.25 m3/kg and a velocity of 175 m/s, enters a…

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Q: A piston-cylinder device contains 0.2-kg of H20 as saturated vapor at 400 kPa. In a constant…

A: Given : Mass (m) = 0.2 kg Pressure saturated vapour= 400 kPa    To Find :-  Work done on the system=…

Q: Refrigerant 134a enters a compressor with a mass flow rate of 15 kg/s with a velocity of 10 m/s. The…

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Q: A fluid enters a machine at 182.39 m/s, 804 kPa, and with a specific volume of 0.206 m3/kg. The…

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Q: A fluid enters a machine at 161.96 m/s, 881.74 kPa, and with a specific volume of 0.174 m³/kg. The…

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Q: Water is heated in a piston/cylinder arrangement at constant pressure. Initially the water is…

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Q: A well-insulated rigid tank contains 3 kg of water at 200 kPa. Initially, half of the volume is in…

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Q: Two kilograms of steam is compressed at constant pressure in a piston/cylinder from an initial state…

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Q: As a spherical ammonia vapor bubble rises in liquid ammonia, its diameter changes from 1 cm to 3 cm.…

A: Given: The initial diameter is d=1 cm=0.01 m. The final diameter is d’=3 cm=0.03 m. The surface…

Q: same elevation and is at rest. The system internal energy between its initial and final states…

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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.