The work required to compress a gas reversibly according to PV1.30 = C is 67,790 J if there is no flow. Determine: Change in internal energy in kJ if the gas is air Heat in kJ if the gas is air Change in internal energy in kJ if the gas is methane Heat in kJ if the gas is methane NOTE: For methane, k = 1.321, R = 518.45 J/kgm-K, Cv = 1.6187 kJ/kgm-K, Cp = 2.1377 kJ/kgm-K.

Q: Air is compressed in a piston-cylinder assembly from p₁ = 25 lb/in², T₁ = 500°R, V₁ = 9 ft³ to a…

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Q: A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.² and 600°F. The water…

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Q: One-quarter Ibmol of oxygen gas (O₂) undergoes a process from p₁ = 20 lb/in², T₁ = 500°R to p2 = 150…

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Q: The relation Δu = cv ΔT is valid for any kind of process, constant-volume or not.

A: Given data: *The initial temperature of the first system is T1i=20°. *The final temperature of the…

Q: Krypton in a closed system is compressed adiabatically from 94 K and 1 bar to a final pressure of 24…

A: Given: initial temperature→T1=94 K Initial pressure→P1=1 bar Final pressure→P2=24 bar Krypton is…

Q: Determine T2, in oR, and the change in entropy, in Btu/oR.

A: Given: n = 1/4 (quarter lb-mol) P1 = 20 lbf/in2 T1 = 500 oR W = -500 BTU Q = -240 BTU It is required…

Q: One-quarter Ibmol of oxygen gas (O2) undergoes a process from p1 = 20 lbf/in?, T1 = 500°R to p2 =…

A: Givenp1=20lbf/in2T1=500°Rp2=150lbf/in2W=-500BtuQ=-127.5BtuNo. of moles of oxygen gas…

Q: Air is compressed in a piston-cylinder assembly from p₁=10 lb/in², T₁ = 500°R, V₁ = 9 ft³ to a final…

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Q: 3. The closed piston-cylinder assembly shown contains Ammonia. The piston moves between two sets of…

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Q: One-quarter Ibmol of oxygen gas (O₂) undergoes a process from p₁ = 20 lb/in². T₁ = 500°R to p₂ = 150…

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Q: One-quarter lbmol of oxygen gas (O2) undergoes a process from p1 = 20 lbf/in2, T1 = 500oR to p2 =…

A: Solution:- Given data :- p1 = 20 lbf/in2                     p2 = 150 lbf/in2                     T1…

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.