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  3. a piston-cylinder assembly has initially a volume

A piston-cylinder assembly has initially a volume of 0.3 m3 of air at 25 oC. Mass...

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Mechanical Engineering

A piston-cylinder assembly has initially a volume of 0.3 m3 ofair at 25 oC. Mass of the air is 1 kg. Weights are put on thepiston until the air reaches to 0.1 m3 and 1,000 oC, in which theair undergoes a polytropic process (PVn = const). Assume that heatloss from the cylinder, friction of piston, kinetic and potentialeffects are negligible. 1) Determine the polytropic constant n. 2)Determine the work transfer in kJ for this process, and discuss itsdirection. 3) Sketch the process in T-V (temperature-volume)diagram.

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