2 kg of propane contained in a piston-cylinder assembly expand from an initial state where T1 = 50 degrees Celsius and P1 = 0.9 MPa to a final state where T2 = 10 degrees Celsius and P2 = 0.3 MPa, with no significant effects of kinetic and potential energy. It is claimed that the expansion generated 70 kJ of work while receiving heat transfer from the environment where the heat transfer happens at an average of 5 degrees Celsius. Evaluate this claim.

Q: A closed system undergoes an adiabatic process. During the process, the system operates at the same…

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

A: Given data: mass of water m=2 lb  Initial Temperature of water Ti =300o F Initial volume of water vi…

Q: Air is contained in a piston/cylinder device at an initial state where the volume is 1.7 m3,…

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Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 200 lb/in²…

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Q: An SUV has a mass of 2136 kg (4700 lbs), and a popular compact car about 1179 kg (2593 lbs). The…

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Q: During a process, the total energy of a closed system increases by 20J. If no work is done in the…

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Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 250 lbf/in²…

A: Givenm=2lbsP=250lbf/in2  at saturated vapourV=7.08 ft3

Q: An adiabatic air compressor compresses 15 L/s of air at 1 bar and 30 °C to 8 bar and 350 °C. A heat…

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Q: A gas contained within a simple piston-cylinder assembly with a fixed piston mass, initially at a…

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Q: creases from zero to Assuming a constant

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Q: Air is contained in a piston/cylinder device at an initial state where the volume is 1.7 m3,…

A: Givenvolume of air V=1.7m3temperature T=250Kpressure P=454kPa

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: There is a piston-cylinder system that undergoes a process. The total work done by the system, W, is…

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Q: A gas with specific volume v₁ = 1 m³/Kg and pressure p₁=1bar in a closed system undergoes a…

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Q: Five kg of water is contained in a piston–cylinder assembly, initially at 5 bar and 300°C. The water…

A: Given data  Mass = 5 kg Water at 5 bar and 300°C heated at constant pressure . Heat transfer =…

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.