Open System Entropy Problem

IPwnNubs

24th May 2011 - 02:39 AM

A thermally insulated piston cylinder device initially contains 0.2m^3, 0.8kg of air at 20 degrees Celcius, and the piston is free to move. Now air at 600kPa and 80 degrees Celcius is slowly applied to the device through a supply line until the volume increases by 50 percent. Using constant specific heats and assume air as ideal gas, determine the entropy generation.

I've been thinking about this for a long time but could not figure it out. I would appreciate any help.

Thank you

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