An insulated vertical cylinder-plunger device contains 0.8 m ^ 3 of refrigerant 134a at 1.2 MPa and 120 ° C. With a linear (compression) spring, all of its force is applied to the plunger at that moment. A valve connected to the cylinder opens and refrigerant escapes. The spring is released as the plunger is lowered, and the pressure and volume drop to 0.6 MPa and 0.5 m ^ 3, at the end of the process. Determine: a) the amount of refrigerant that escaped and b) the final temperature of the coolant

Q: The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the…

A: Given Data: The exit pressure of jet is: P2=200 kPa The inlet pressure of the jet is= P1=100 kPa…

Q: If you had a fixed mass of hot air stored in a rigid container and decided to transfer heat from the…

A:

Q: 5. A system of 100 kg mass undergoes a process in which its specific entropy increases from 0.3…

A: Given, Mass of system = m = 100 kg Initial specific entropy of system = ssys1 = 0.3 kJ/kg-K Final…

Q: Q25. 0.5 kg of air at pressure of 2000 kN/m2 occupies 0.1 m' and from this condition it is expanded…

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Q: Two gaseous stream containing the same fluid enter a mixing chamber and leave as a single stream.…

A:

Q: motor-pump system with 90% efficiency is designed to increase the pressure of was from 101kPa to 250…

A: Hh

Q: An insulated vertical piston–cylinder device initially contains 0.11 m3 of air at 150 kPa and 22°C.…

A: Given data: Initial volume, V1 = 0.11 m3 Initial pressure, P1 = 150 kPa Initial temperature, T1 =…

Q: A 0.2 m3 vessel contains 1265 kg of water at 90 ⁰C. Determine pressure, specific and total internal…

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Q: Q22. 0.25 kg of air at pressure of 140 kN/m2 occupies 0.15 m' and from this condition it is…

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Q: Seventy kilojoules of work is done by each kilogram of fluid passing through an apparatus under…

A: Given:- W=70 KJ/Kg V1=3m3/kg P1=300 kPa U1=50m/s Z1=30m Z2=15m V2=9m3/kg P2=60 kPa Q= -3KJ/Kg To…

Q: 3. At 335 °C, a steam turbine receives 800 kPa of steam. Then expand to a pressure of 0.02 MPa in an…

A:

Q: Q17) Two identical copper blocks of mass m=1.5 kg, block L at temperature Ta = 60 °C and block R at…

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Q: Steam enters a turbine stage with pressure of 5 bar, specific volume of 0.125m3/kgm and an enthalpy…

A: It is the basic numerical of thermodynamics and the key concept to solve the numerical is first law…

Q: A 30-kw compressor compresses air from P to P2. As a result of heat transfer to the surrounding…

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Q: Question 1 A mass of 0.7 kg of air undergoes two reversible processes in a piston-cylinder device as…

A:

Q: wenty cu. Ft of air at 320 psia and 420°F is cooled to 150°F at constant volume. Cv = 0.1714 and k =…

A:

Q: Q11) In an air turbine, the air expands from 6.8 bar & 430°C to 1.013 bar & 150 °C. The heat loss…

A: Given data:

Q: Seventy kilojoules of work is done by each kilogram of fluid passing through an apparatus under…

A: GIVEN DATA -

Q: With your knowledge of the thermodynamic identity, derive a relationship for the heat capacities at…

A:

Q: Q.6 A 75 ohm resistor carrying a constant current of 1 A is kept at a constant temperature of 27 °C…

A: Data given-  R = 75 ohm  I = 1 Ampere  T = 27°C = 300 K  t = 1 sec

Q: Determine  the velocity of the air at exit from the nozzle when the inlet velocity is negligibly…

A:

Q: Oxygen enters a nozzle steadily at 3 kg/m3 and 35 m/s and leaves at 0.76 kg/m3 and 190 m/s. If the…

A: Given data: v1=3 kg/m3V1=35 m/sA1=85 cm2v2=0.76 kg/m3V2=190 m/s Need to determine the area of the…

Q: Oxygen enters a nozzle steadily at 2 kg/m3 and 35 m/s and leaves at 0.76 kg/m3 and 180 m/s. If the…

A:

Q: Calculate the entropy change of the universe as a result of the following processes: (a) A copper…

A: Given data: (a) Convert the temperature in kelvin.

Q: 10. Steam at 173.46 degrees celcius and with a specific entropy of 6 kJ/ kg K undergoes a polytropic…

A: Given:    steam     T1=173.46°C=173.46+273                         =446.16K     S1=6KJ/kg,…

Q: 3. If the water flowing out of the nozzle can be considered to be incompressible, with negligible…

A: Find the pressure at section A and flow rate out of the tank. Using bernauli's theorem.

Q: A turbine operates under steady flow conditions, receiving steam at the following state: pressure…

A: Given data:

Q: frictionless piston-cylinder assembly initially contains saturated liquid water at a pressure of 200…

A: From steam tables At 200 KPa hf = h1 = 504.71 KJ/Kgsf = s1 = 1.5302 KJ/KgK. It is a constant…

Q: Seventy kilojoules of work is done by each kilogram of fluid passing through an apparatus under…

A:

Q: Steam at 1 MPa and 300°C is throttled adiabatically to a pressure of 0.4 MPa. If the change in…

A: The throttling is a process in which the enthalpy remains the same throughout the process. On using…

Q: frictionless piston-cylinder assembly initially contains saturated liquid water at a pressure of 200…

A:

Q: At the inlet of a steam turbine, the pressure and the temperature of the steam are P1 = 1 MPa and T1…

A: Given, P1=1 MPaT1=300 0C P2=7.5 kPax2=0.9

Q: steam turbine is designed to operate at a mass flow of 1.5 kg/s. Inlet state to the turbine P1=2…

A:

Q: In a steady flow apparatus, a fluid enters with a specific volume of 0.40 m3/Kg, a pressure of 550…

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Q: Q1: The gases in the cylinder of an internal combustion engine have a specific internal energy of…

A: Step by step solution is given below

Q: Calculate the quality of the fluid: Ammonia at a saturation temperature of 0°C, with a specific…

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Q: Air enters a gas turbine steadily at pressure 20 kPa, volumetric flowrate 1,000 m3/s, and…

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Q: The entropy change between two specified states is the same whether the process is reversible or…

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Q: A turbine operates under steady flow conditions, receiving steam at the following state: pressure…

A:

Q: Two gaseous streams containing the same fluid enter a mixing chamber and leave as single stream. For…

A:

Q: 0.1 m3 rigid tank (tank volume is constant) contains water at 200ºC and 500 kPa at the beginning.…

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Q: Q3 The gases in the cylinder of an internal combustion engine have a specific internal energy of 800…

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Q: Two kg water at 95°C with a quality of 40% has its temperature raised 15°C in a constant volume…

A: Calculated new specific entropy.

Q: hanges reversibly from an initial state of specific entropy 4 kJ/kg K and temperature 280 K to a…

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Q: A driver applies the brakes on 1,000 kg automobile to stop from a speed of V = (70 + y/2) km/hr.…

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Q: Steam enters a turbine stage with pressure of 5 bar, specific volume of 0.125m3/kgm and an enthalpy…

A:

Q: At the inlet of a steam turbine, the pressure of the steam is P1 = 1 MPa, temperature T1 = 3000C and…

A:

Q: Q2: A turbine operating under steady flow conditions receives steam at the following state: pressure…

A: Given data Initial conditions pressure(P1) = 15 bar  specific volume 0.15 m3/kg internal energy 2600…

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.