A mass of 3 kg of water contained in a piston–cylinder assembly expand from an initial state where T1 = 551°C, p1 = 700 kPa to a final state where T2 = 224°C, p2 = 300 kPa, with no significant effects of kinetic and potential energy. It is claimed that the water undergoes an adiabatic process between these states, while developing work. Evaluate entropy production in Joules/k.

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Q: 4. A quantity of steam of mass 2.5 kg at 86 bar occupies a volume of 0.052 m³ in a cylinder behind a…

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Q: done during the process is

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Q: Initially, a closed system consists of 2 lb of water vapor at the temperature and volume of 300°F…

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Q: Two kg of water is contained in a piston–cylinder assembly, initially at a pressure of 10 bar and a…

A: Basics of Thermodynamics and use of Steam table.

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Q: A cylinder-piston apparatus contains nitrogen initially at 20 bar, 107ºC and 0.3 m ^ 3. The piston…

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Q: A polytropic process (n = - 1) has initial state with P = 0 KPa, V = 0 m³ and final state with P=…

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Q: 4. The properties of a closed system change following the relation between pressure and volume as pV…

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Q: 4 kg of saturated water at 59.3 C undergoes a process during which the temperature increases to 120…

A: Option d is correct.

Q: One pound mass of water in a piston-cylinder assembly, initially a saturated liquid at 45 lb/in²,…

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Q: Take g = 9.145 m/s2 A vertical, frictionless piston-and-cylinder arrangement contains 1 kg of steam…

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Q: D. Discuss why the assumption of negligible piston acceleration was made. E. Which of the work…

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Q: A closed gas system undergoes a reversible process during which 6.3 Kcal are expelled, the volume…

A: The heat rejected, The initial volume, The final volume, The absolute constant pressure,To find:The…

Q: Two pounds mass of water in a piston-cylinder assembly, initially a saturated liquid at 35 lb/in²,…

A: m=2lbP1=P2=35lbf/in2state 1P1 =35lbf/in2 and saturated liquid T=259.30 F= 718.97 Rv1 = 0.01708…

Q: Part II 11. Two lbm of air initially at P₁= 15 psia and T₁ = 150 °F undergoes a cycle consisting of…

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Q: 3.1) A plunger-cylinder that initially contains 0.55 kg of air at a temperature of 250 °C and a…

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Q: cylinder with a moveable piston holds 0.21 lbm of hydrogen initially with a volume of 1.11 ft^3 at a…

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Q: A piston cylinder set up initially contains 5 kg of water at the saturated liquid state (state 1).…

A: The work transfer for each process: W12 = 964.2 kJ W23 = 0 kJ

Q: Two kg of refrigerant R134a, initially at P₁ = 1 MPa, u₁ = 312.70 kJ/kg, is con well-sealed copper…

A: Given data as per questionMass of refrigerant, m=2 kgP1=1 MPa, u1=312.7 kJ/kgW˙=0.1 kWQ˙=k t2,…

Q: Refrigerant 134a at p₁ = 30 lb/in², T₁ = 40°F enters a compressor operating at steady state with a…

A: Given data: p1=30 lbf/in2T1=40°Fm˙=225 lb/hp2=160 lbf/in2To=40°FW˙C=-2.25 hp=-5725 Btu/hr Need to…

Q: Three pounds mass of water in a piston-cylinder assembly, initially a saturated liquid at 15…

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Q: nally reversible expansion to x2 = 90%.

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Q: A piston-cylinder device has a 2 kg refrigerant R-134. The piston, which has a diameter of 20mm and…

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Q: to x2 = 90

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Q: 2.5 kg of saturated water at 80.9 C undergoes a process during which the temperature increases to…

A: Option a is correct.

Q: The entropy change of a system can be negative, but the entropy generation cannot.

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Q: Q3: A certain fluid at Pressure of 6 bar, and with a specific volume of 0.12 m³/kg. Contained in a…

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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: We have to Determine the amount of work during this process (kJ

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

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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.