A 0.4m^3 tank contains oxygen initially at 120-bar and 30C. A paddlewheel within the tank is rotated until the pressure inside rises to 184bar. During the process 20kJ of heat is lost to the surroundings. Determine the absolute value of paddlewheel work. For oxygen, assume a constant specific heat capacity of cv = 0.658kJ/kg^-1/K^-1 and R = 0.2598 kJ/kg^-1/K^-1

Q: A monatomic ideal gas initially fills a V0 = 0.45 m3 container at P0 = 85 kPa. The gas undergoes an…

A: Given, Initial volume, V1=0.45 m3 Final volume, V2=1.4 m3 Initial pressure, P1=85 kPa=85000 Pa

Q: The temperature of a 500 gram closed system was 10 C. By an electric heater, Energy of 2000 calories…

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Q: A rigid tank of volume 10 m³ initially contains saturated water vapor at a temperature of 120 °C.…

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Q: 850 g of a certain substance is heated at constant pressure from 40 ⁰C to 70 ⁰C. Specific heat…

A: For solving this problem, we first solved the quadratic equation and calculated the value of Cp. We…

Q: Two boilers one with superheater and another without superheater are delivering equal quanttes of…

A: Given Data: The pressure of boiler, P1=P2=20 bar The pressure of the main, P3=20 bar

Q: Two tank are connected, as shown in the figure below, both containing water. Tank A contains 0.5 kg…

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Q: A piston-cylinder device initially contains 0.4 m^3 of saturated water vapor at a pressure of 200…

A: vapor pressure = 200kPa loss pf heat = 10kJ PRESSURE RISES TO = 300KPA

Q: Refrigerant 134a expands in a piston-cylinder assembly from p₁ = 140 lb/in² and T₁ = 140°F to p2 =…

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Q: A certain quantity of gas with an initial condition of 14 bar, 0.08 m3, and 450 K expands at…

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Q: In a piston-cylinder setup, 2 kg of water undergoes a constant temperature expansion at T=200°C from…

A: Specific volume of a fluid is defined volume of the fluid per unit mass of fluid. Work is defined as…

Q: the work done (W12) in (kJ) is Below 10 O Between 10 and 30 O Between 30 and 50 O Between 50 and 70…

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Q: A piston-cylinder device initially contains 0.4 m^3 of saturated water vapor at a pressure of 200…

A: Answer: The required voltage for the electric resistive heater is 22.3611 Volts.

Q: 0.25kg/s of Carbon Dioxide (R = 0.1889 kJ/kg-K, k = 1.289) undergo a certain process in a close…

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Q: A dividing wall divides an insulated container into two compartments as shown in the figure.…

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Q: A piston-cylinder device contains 25 g of saturated water vapor which is maintained at a constant…

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Q: A person living in a 5m × 5m × 5m room turns on a 130 W fan before he leaves the warm room at 100…

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Q: Determine the internal energy of steam in BTU if the mass is 10 lbs, pressure is 645.43 kpa,…

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Q: Calculate the amount of work necessary for the reversible compression of steam from 1 bar to 10 bar.…

A: Initial pressure of steam, Final pressure of steam, Compression is reversible and isothermal…

Q: 3. A system containing 6 lbm of R-22, initially at P1 = 60 lbf/in? and V1 = 2.75 ft, is subjected to…

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Q: Calculate the amount of work necessary for the reversible compression of steam from 1 bar to 10 bar.…

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Q: While the temperature remains constant at 38 degrees C, 2.5 kg of a certain ideal gas whose Cp =…

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Q: A 5-hp pump compressor delivers oxygen at a rate of 30 cubic feet per minute. The pressure and…

A: Given data: Power consumed by compressor = 5 hp = 3.73 KW                     Discharge rate = 30…

Q: 1.5 kg of an ideal gas occupies a volume V at 35 °C. The gas expands adiabatically to a volume 3V.…

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Q: c) As shown in Figure A1-c, a gas is contained in a piston-cylinder assembly. The mass and the…

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Q: a. What is the mass of the gas in kg b. What is the mass of the piston in kg c. Calculate the volume…

A: PV=mRT m =PV/(RT) = (200 *1000*0.5)/(488.21* 408) = 0.502034 kg

Q: The figure below shows a piston-cylinder assembly fitted with a spring of stiffness k = 29.7 N/m…

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Q: A metal tank contains air at 20 C and 400 kPa. The tank volume is 5 m³. It is connected through a…

A: given; →tank 1st;→temperature(T1)=200c=293K→pressure(P1)=400KPa→volume(V1)=5m3→for tank 2;→mass of…

Q: An ideal gas in a leak tight cylinder-piston assembly undergoes an isobaric compression at a…

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Q: 0.5 kg of air with a pressure of 2 MPa and a temperature of 250 °C expands while satisfying the…

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Q: Five pounds of mass of water are contained within a cylinder-piston system. The initial temperature…

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Q: 2. A dividing wall divides an insulated container into two compartments as shown in the figure.…

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Q: ft-lb Two pounds of gas, for which R = 26 - Ib-R and k =1.10 undergo a polytropic process from P =…

A: Gas m = 2 lb = 0.907 kg  R = 26 ft-lb/lb-R = 0.14 kj/kg.k k = 1.1 P1 = 15 psia = 103.4 kpa T1 = 100F…

Q: Find the change in internal energy of 5lbs of oxygen when the temperature changes from 100°F to…

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Q: A cylinder with a moveable piston holds 0.48 lbm of hydrogen initially with a volume of 1.49 ft^3…

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Q: piston-cylinder device initially contains 0.4 m^3 of saturated water vapor at a pressure of 200 kPa.…

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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.