The volume of 1 kg of helium in a piston-cylinder device is initially 5 m³. Now helium is compressed to 2.5 m³ while its pressure is maintained constant at 130 kPa. Determine the initial and final temperatures of helium as well as the work required to compress it, in kJ. The gas constant of helium is R=2.0769 kJ/kg.K. The initial temperature of helium is 311.39 ✔ K. The final temperature of helium is 125.18 > K. The work required to compress helium is 390 kJ.

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Q: A piston-cylinder device initially contains 0.4 m^3 of saturated water vapor at a pressure of 200…

A: vapor pressure = 200kPa loss pf heat = 10kJ PRESSURE RISES TO = 300KPA

Q: Air is cooled during an isobaric process at 4.84 atm from an initial specific volume of 1 m³/kg to a…

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Q: The volume of 1 kg of helium in a piston-cylinder device is initially 5 m³. Now helium is compressed…

A: Given:The mass of the helium, (m)=1 kg.The initial volume of the helium, ()=5 m3The final volume of…

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Q: Refrigerant-134a at 320 kPa and 40°C undergoes an isothermal process in a closed system until its…

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Q: A piston cylinder device initially contains 1.2 kg of a liquid-vapor mixture of water at 2 bars and…

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Q: A gas contained in a vertical cylindrical tank has a volume of [10 + (K/100)] m3 . The gas receives…

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Q: A vertical piston-cylinder assembly containing 0.3 Kg of steam, initially a vapor, is placed on a…

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Q: Air is cooled during an isobaric process at 3.7 atm from an initial specific volume of 1.35 m3/kg to…

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Q: An insulated, vertical piston–cylinder device is purchased from a manufacturer. Upon purchase, it…

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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.