An insulated vertical piston–cylinder device initially contains 10kg of water, 5kg of which is in the vapor phase. Initially the pressure is 200 kPa inside the cylinder. A linear spring is connected to the piston therefore the pressure changes linearly with volume (P=m*V+b). Super heated steam at 0.5 MPa and constant temperature is allowed to enter the cylinder from a supply line until all the liquid in the cylinder has just vaporized and the pressure and volume in the cylinder have both doubled. Determine the final temperature, mass of the steam, boundary work, and specific enthalpy

Q: Steam at 1MPa and 554.8726 °C enters an insulated turbine and exits as saturated vapor at 20 kPa.…

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Q: Steam is cooled in a cylinder with a frictionless piston from     20kPa and 80 % dry until the…

A: Given      Initial Pressure, P1= 20 kPa      Dryness fraction, x = 0.8

Q: (2) A well-insulated 114 m room initially at 4°C and 90 kPa is heated by the radiator of a steam…

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

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

Q: (a) i) Consider an ideal gas at a given state that expands to a fixed final volume. In the first…

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Q: 3- A mass of 10 kg of saturated refrigerant-134a vapor is contained in a piston-cylinder device at…

A: Given data: Mass of saturated vapor refrigerant R-134a, m = 10 kg. The saturated vapor pressure in…

Q: (2) A well-insulated 170 m' room initially at 11°C and 104 kPa is heated by the radiator of a steam…

A: Given that ,   Initial air temperature of room (Ta1)=11 °C Radiator volume (V1)=75L  Initial steam…

Q: An insulated vertical cylinder-piston device contains 0.8 m3 of refrigerant 134a at 1.2 MPa and 120…

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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: 0.05 kg of a certain gas in a piston and cylinder is compressed reversibly until the pressure…

A: Given: Mass of the gas (m)=0.05kg Initial pressure of the gas P1=0.1025MPa Initial volume of the gas…

Q: Air at 27°C and 100 kPa is contained in a piston– cylinder device. When the air is compressed…

A: Given, T1 = 27°C = 27+273 = 300 K P1 = 100 kPa T1 = 27°C = 27+273=300°K W = 1000 kJ P2 = 600 kPa m=?…

Q: (2) A well-insulated 114 m room initially at 4°C and 90 kPa is heated by the radiator of a steam…

A: Let m= mass of air  cv=specific heat of air at constant volume=0.718KJ/kgK T=Temp. of air before…

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: A tank, well insulated, has two parts divided by partition. The first part incuded 5,5 kg of water…

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Q: An insulated piston-cylinder arrangement contains water. Sixty percent of the total 15 kg of water…

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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: A 0.40-m3 insulated piston–cylinder device initially contains 1.3 kg of air at 30°C. At this state,…

A: Given: The initial volume of the air is V1=0.40 m3. The final volume of the air is…

Q: A quantity of ideal gas occupies 0.5 m3 at 5oC and 165 kPa. It is compressed in accordance with the…

A: Given   Initial      Pressure, P1 = 165 kPa       Volume, V1 = 0.5 m3 Final      Pressure, P2 = 350…

Q: ) A piston – cylinder device initially contains 1 kg of saturated water vapor at 0.2 MPa. Water is…

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Q: Q4/ A piston-cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and

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Q: R-134a contained in a piston cylinder is to be condensed to a saturated liquid at constant pressure…

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Q: The air in an insulated, rigid compressed-air tank whose volume is 0.5 m3 is initially at 2400 kPa…

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Q: Steam enters an adiabatic turbine at 5 MPa and 450°C and leaves at a pressure of 1.4 MPa. Determine…

A: Given data: The inlet pressure, P1 = 5 MPa. The outlet pressure, P2 = 1.4 MPa. The inlet…

Q: R-134a contained in a piston cylinder is to be condensed to a saturated liquid at constant pressure…

A:

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

A:

Q: A rigid, insulated tank that is initially evacuated is connected through a valve to a supply line…

A: Given data as per the question Pressure in the tank = 4Mpa The final temperature of steam =  5500 c

Q: On a P-v diagram, what does the area under the process curve represent?

A: In the P-V diagram, the area under the process curve represents the work done by the gas.

Q: Consider a well-insulated horizontal rigid cylinder that is divided into two compartments by a…

A: m1=mass of nitrogen gas ; P1=pressure of nitrogen gas at one side of piston= 500 kPa ; V1=voume of…

Q: An insulated, vertical piston-cylinder device initially contains 10 kg of water, 6 kg of which is in…

A: First law of thermodynamic states that the energy is neither created nor destroyed but can be…

Q: Two rigid tanks are connected by a valve. Tank A is insulated and contains 0.3 m3 of steam at 400…

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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: Steam expands in a turbine steadily at a rate of 18,000 kg/h, entering at 7 MPa and 600°C and…

A: The values of enthalpy and entropy are taken from the steam table                h1=3650.6…

Q: (2) A well-insulated 170 m' room initially at 11°C and 104 kPa is heated by the radiator of a steam…

A: Given:-             To calculate the heat transfer from the steam radiator to inside the room air.…

Q: Cold water enters a steam generator at 20°C and leaves as saturated vapor at 200°C. Determine the…

A: Given data: Cold water temperature, T1= 200C Water temperature leaving the steam generator, T2 =…

Q: A 0.3-m3 rigid tank initially contains refrigerant- 134a at 14°C. At this state, 55 percent of the…

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Q: Water vapor at 100 kPa and 150°C is compressed isothermally until half the vapor has condensed. How…

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Q: 13. A volume of 3 m3 of saturated water vapor at 300 kPa is heated at constant pressure until the…

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Q: piston–cylinder device contains 1.2 kg of nitrogen gas at 120 kPa and 27°C. a) The gas is now…

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Q: An ideal gas at a given state expands to a fixed final volume first at constant pressure and then at…

A: Work done in case of isobaric pressure is always greater than isothermal process. Area under PV…

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

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.