Someone claims, based on temperature measurements, that the temperature of a fluid rises during a throttling process in a well-insulated valve with negligible friction. How do you evaluate this claim? Does this process violate any thermodynamic laws?

Q: What is the second-law efficiency? How does it differ from the first-law efficiency?

A: Before understanding the first and second law efficiency and the difference we have to understand…

Q: An adiabatic diffuser is employed to decrease the velocity of an airstream from 220 to 30 m/s. The…

A: GIVEN DATA - m=8kg/s C1=220m/s C2=30m/s T1=300'C = 573K P2=125KPa WE HAVE TO CALCULATE EXIT AREA

Q: Is the relation Δh = mcp,avgΔT restricted to constantpressure processes only, or can it be used for…

A: Rewrite the given relation. Here, m is the mass of the gas, cp,avg is the average of specific heats…

Q: hat is the expression of heat for an isothermal reversible expansion of a perfect gas from initial…

A: Reversible isothermal expansion: In this process temperature is constant and the pressure of the…

Q: A mass of 0.59 g of air is in the cylinder of a low compression ratio diesel engine at a pressure of…

A: The mass of gas is The initial pressure is The initial volume is The initial temperature is The…

Q: Calculate the work required to pump 45 liters/min of water from 170KPa and 40℃ to MPa in an…

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Q: A rigid tank contains air at 80°C that is being stirred by a paddle wheel. The paddle wheel does 400…

A: Entropy Entropy is a scientific concept, as well as a measurable physical property that is most…

Q: A gas compressed adiabatically from the initial pressure and temperature of 100 kN/m? and 36 °C…

A: we are suppose to solve only 3 subparts, please  post other parts as separate question.

Q: A steady flow thermodynamic system receives 100lb/min of fluid at 30psia and 200 °F and discharges…

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Q: Water initially at 20 °C and having a mass of 100 kg is to be heated to 100°C in a boiler using…

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Q: For an adiabatic air compressor that has an inlet temperature of 300 K and exit temperature of 500…

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Q: Imagine you are asked to design a thermal engine that is to operate between thermal reservoirs at 10…

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Q: A refrigeration system is being designed to cool eggs (ρ = 67.4 lbm/ft3 and cp = 0.80 Btu/lbm·°F)…

A: Given that,

Q: Real heat engines, like the gasoline engine in a car, always have some friction between their moving…

A: A heat engine is a device that converts thermal energy into mechanical energy. There are two types…

Q: A 4-m x 5-m x 6-m room is to be heated by a baseboard resistance heater. It is desired that the…

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Q: rigid tank contains air at 40°C that is being stirred by a paddle wheel. The paddle wheel does 250…

A: Given Data Rigid tank Ts=30°C Win=250 kJ

Q: A 1000-gallon compressed air receiver cylindrical tank of internal diameter equal to 5.75 ft is…

A: Given data:The volume of the tank is The internal diameter of the tank is The steady-state operating…

Q: a) Draw the process on the PV diagram and explain the changes of pressure and volume durin the…

A: Pneumatic: The pneumatic is the system in which the pressurized air used for the applications. The…

Q: Before the widespread use of mechanical refrigeration, cooling was provided by ice, which was…

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

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Q: How does the efficiency of an idealized automobile engine depend on the operating temperature of the…

A: Draw the PV diagram of the heat engine.

Q: A thermodynamic system with 45 pounds of Neon simultaneously reject heat and receive paddle-work…

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Q: Air enters a compressor of a jet engine at 0.65 atm and 275 K with a flow rate of 63.5 kg/s. The…

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Q: In Otto Cycle, air at 18oC is first compressed to one- eight of its original volume.  If the heat…

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Q: Steam enters the turbine of a simple vapor power plant with a pressure of 10 MPa and temperature of…

A: State 1: Pressure, P1= 10 MPa Temperature, T1= 580∘C State 2: Pressure, P2= 6 kPa

Q: Define the isentropic, polytropic, and isothermal compression processes between the same pressure…

A: The isentropic, polytropic and isothermal compression process between the same pressure limits can…

Q: Air is compressed in a piston-cylinder device in a reversible isothermal process at a temperature of…

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Q: The temperature of the reservoir of a Carnot engine, operating with an efficiency of70% is 1000K.…

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Q: As shown in the figure below, 0.1 kg of water is contained within a piston- cylinder assembly at…

A: The mass of the water is mw=0.1 kg. The initial temperature is Ti=100°C. The final temperature is…

Q: Derive the non-flow and flow energy equations from first thermodynamic principles

A: To find-: Derive the non-flow and flow energy equations from first thermodynamic principles.…

Q: A desktop computer is to be cooled by a fan. The electronic components of the computer consume 80 W…

A: It is required to determine the average temperature. Refer table “Ideal gas specific heats of…

Q: A refrigeration system is being designed to cool eggs ( r = 67.4 lbm/ft3 and cp = 0.80 Btu/lbm·°F)…

A: Write the expression of heat removal from the eggs.

Q: It is well-known that the temperature of a gas rises while it is compressed as a result of the…

A: Given: The maximum temperature of the compressor, Te = 250oC The maximum recorded temperature in Los…

Q: A rigid tank contains air at 50°C that is being stirred by a paddle wheel. The paddle wheel does 350…

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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: Waternearthesurfaceofatropicaloceanhasatemperatureof25°C, while water 700 m beneath the surface has…

A: Let, Th be the surface high temperature of ocean. Ts be the temperature 700m beneath the surface.…

Q: Why is enthalpy generally more useful than internal energy in the thermodynamics of real world…

A: The total energy contained by the thermodynamic system is known as the internal energy of the system…

Q: A camot engine operating between 775 K and 305 K produces 54 kJ of work. Determine the change in…

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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: 1. A Camot engine operating between 775 K and 305 K produces 54 kJ of work. Determine (a) Qa, (b) AS…

A: Note:As per our guidelines we are supposed to answer only one question. Kindly repost other…

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.