A closed thermodynamic system undergoes a cycle comprising four processes 1- 4. The following amount of heat is transferred through the system boundaries: Process 1: 50 kJ heat added to the system Process 2: 80 kJ heat removed from the system Process 3: 100 kJ heat added to the system Process 4: 40 kJ heat removed from the system What is the net work done in this cyclic process?

Q: A closed system consisting of 10 Ib of air undergoes a polytropic process from p1 = 80 lbf/in?, v1 =…

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Q: The figure shows two power cycles, A and B, operating in series, with the energy transfer by heat…

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Q: A closed system consisting of 10 lb of air undergoes a polytropic process from p₁ = 65 lbf/in², v₁ =…

A: Given:Mass of air, m=10 lbInitial pressure of air, P1=65 lb/in2Initial volume of air, v1=4…

Q: Consider the combined process of Thermodynamics (ABC process in the following figure) Determine:…

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Q: A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state…

A: Given data: Q1-2=5 JW1-2=10 JQ2-3=25 JW2-3=-20 JQ3-1=-40 J Need to determine the value of heat in…

Q: An isolated system is at rest. There is no change in the system potential energy. What is the change…

A: Solution: The internal energy of a system is determined by the random, uneven molecular movement; in…

Q: Carbon monoxide (CO) gas within a piston cylinder assembly undergoes three processes in series.…

A: Process 1-2 PV=constantP1=5.75 bar v1=.2025 m3v2=1.1775 m3So work done during this…

Q: In a steady flow process, the change of energy with respect to time is zero. True False

A: Given Statement:-  In a steady flow process, the change of energy with respect to time is zero.…

Q: A gas undergoes a process in a piston-cylinder assembly during which the pressure-specific volume…

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Q: The figure belows shows an object whose mass is 15 lb attached to a rope wound around a pulley. The…

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Q: A heat pump cycle delivers energy by heat transfer to a dwelling at a rate of 40,000 Btu/h. The…

A: Given: Heat transfer rate Q=40000 Btuh The coefficient of performance of cycle COP=3 The electricity…

Q: A gas is contained in a vertical piston-cylinder assembly by a piston with a face area of 60 in² and…

A: piston area ap=60 in2 weight W = 100 lb atmospheric pressure pa=14.7 lb/in2 change in elevation of…

Q: If a closed system undergoes a process during which it receives energy by heat transfer and work is…

A: First law of thermodynamics: According to this law,” the energy of an isolated system remains…

Q: Steam in a piston-cylinder assembly undergoes a polytropic process, with n = 2, from an initial…

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Q: 4. An object initially at an elevation of 5 m relative to Earth's surface with a velocity of 50 m/s…

A: Finding change in total energy change brought by the work done

Q: Prove that for an isolated system, there is no change in internal energy.

A: Approach to solving the question:First law of thermodynamics Detailed explanation:  Definition of an…

Q: A gas is contained in a vertical piston-cylinder assembly by a piston with a face area of 60 in² and…

A: Given piston weight =100 lb  Pressure p = 14.7 lb/in2

Q: Steam in a piston-cylinder assembly undergoes a polytropic process, with n=2, from an initial state…

A: Given data  Process is polytropic  n =  2 V1 = 1.75440 ft3 P1 = 350 lbf/in2 u1 = 1322.4 Btu/lb  v2 =…

Q: piston–cylinder assembly contains 0.1 lb of propane.  The propane expands from an initial state…

A: Given:mass of propane, m=0.1 lbinitial pressure ,P1=60 lbf/in2final pressure ,P2=10 lbf/in2initial…

Q: At a given instant, a closed system is loosing 0.21 kW of heat to the outside atmosphere. A battery…

A: Given data: Q1˙=0.21 kWQ2˙=40 WW=0.21 kW Need to determine the rate of external work transfer, the…

Q: A closed system consisting of 10 lb of air undergoes a polytropic process from p₁ = 80 lbf/in². v₁…

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Q: A closed system consists of gas of 2 kg initially in state 1 with P1 = 4bar and specific volume v1 =…

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Q: 1Kg of water contained in a piston-cylinder assembly undergoes five processes in series as follows:…

A: P1=P2=P5=10 barP3=P4=5 barV2=V3V4=V5x4=0.45T3=180°C=453 K

Q: In an open system there must always be which of the following? There may be greater than one answer?…

A: Thermodynamic system is classified as 1. Closed system 2. Open system 3. Isolated system     Energy…

Q: gas inside a piston-cylinder assembly undergoes a refrigeration cycle consisting of these three…

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Q: Steam in a piston-cylinder assembly undergoes a polytropic process, with n = 2, from an initial…

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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.