1. An insulated piston/cylinder contains 0.1 m3 air at 250 kPa, 300 K and it maintains constant pressure. More air flows in through a valve from a line at 300 kPa, 400 K, so the volume increases 60%. Use constant specific heats to solve for the final temperature and the total entropy generation.

2. A balloon is filled with air from a line at 200 kPa, 300 K to a final state of 110 kPa, 300 K with a mass of 0.1 kg air. Assume the pressure is proportional to the balloon volume as P = 100 kPa + CV. Find the heat transfer to/from the ambient at 300 K and the total entropy generation.

 

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Status NEW Posted 01 May 2017 05:05 PM My Price 5.00

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