11. The work required to compress a gas reversibly according to pv1.30- cis 67, 790 J, if there is no flow. Determine AU and Q if the gas is (a) air, (b) methane. For methane, k = 1.321, R=518.45 1/kgm K, C = 1.6187, cp = 2.1377 kJ/kgm.K. Ans. (a) 50.91 KJ, -16.88 kJ; (b) 63.50 kJ, -4.29 kJ

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Q: Determine the change in specific entropy, in kJ/kg K, of CO2 as an ideal gas undergoing a process…

A: Given:T1=300 KP1=1 bar =100 KPaT2=1420 KP2=5 bar =500 KPa

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Q: How much entropy, in kJ/K, is transferred to 20 kg of helium at 20 degrees C if the temperature is…

A: Given data  mass of Helium (m) = 20 kg  initial temperature (T1) = 20oC = 20+273 K = 293 K final…

Q: 7-40 Air enters a compressor operating at steady state at 7:=320 K, p. = 2 bar with a velocity of 80…

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Q: Water contained in a closed, rigid tank, initially at 100 lb/in², 800°F, is cooled to a final state…

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Q: The work required to compress a gas reversibly according to pV^1.30 = C is 67,790 J, if there is no…

A: Amount of heat transferred by the methane,              Q=Kmethane-nKmethane-1W K_{methane}=1.321,…

Q: 5 5♫ 8 40°C R-22 QAA = 50 kW 40°C mB = 0.3 kg/s B -20°C Tin = 10°C 9 Ⓡ funny (mm) 3 1 The above…

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Q: An oxygen gas R = 0.2598 KJ/kg°k and k = 1.395. If 4 kg of oxygen undergo a reversible non flow…

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Q: evaluate the irreversibility

A: Given; During expansion, heat transfer from air to the surrounding at 300 K  Or,Air expands steadily…

Q: The work required to compress a gas reversibly according to PV1.30 = C is 67,790 J if there is no…

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Q: Refrigerant-134a, at 1.5 MPa, 90 °C, is to be cooled by air to a state of 1 MPa, 27 °C in a…

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Q: HW4.4. Enthalpy Change of Water 22 kg of water, initially at 80 ° C and 2 bar, occupying 0.06 m³…

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Q: Current Attempt in Progress Water contained in a closed, rigid tank, initially at 100 lbf/in?,…

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Q: Determine the change in specific entropy, in kuikg K. of CO2 as an ideal gas undergoing a process…

A: Calculated the change in specific entropy in kJ/kg k.

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Q: Plot and determine the values of h5, W5, twb5 & tdb5 involving adiabatic mixing as shown below. Air…

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Q: 6. A fluid at a pressure of 3 bar and specific volume of 0.18 m³/kgm contained in a piston cylinder…

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Q: 60. 5.5. The following information is known about the steady flow of air through an adiabatic…

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Q: Air (??=7/2R constant)Cp=7/2R constant) expands in a steady‑state device from 874.8 kPa874.8 kPa and…

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Q: Q.9 Steam is isentropically expanded in a turbine from 80 bar to 7 bar. At the inlet of the turbine…

A: Data given-  P1 = 80 bar  P2 = 7 bar  h1 = 3246 kJ /kg  s1 = 6.52 kJ/kg K

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Q: undergo à constant pressure process until the quality becomes 50% (h₂ = 2220, V₂ = 0.075, S₂ =…

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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.