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A 0.40-m3 insulated piston-cylinder device
initially contains 1.3 kg of air at 30°C.. At this
state, the piston is free to move. Now air at 500
kPa and 70°C is allowed to enter the cylinder
from a supply line until the volume increases by
50 percent. Using constant specific heats at
room temperature, determine the entropy
generation.

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