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Required information

NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part.

Five kilograms of air at $427C$ and $600$kPa are contained in a piston$-$cylinder device. The air expands adiabatically until

the pressure is $100$kPa and produces $450kJ$ of work output. Assume air has constant specific heats evaluated at $300K.$

Determine the entropy change of the air in $k\frac{J}{k}g*K.$ Use the table containing the ideal gas specific heats of various common gases.

$($You must provide an answer before moving on to the next part.$)$

The entropy change of the air is

$k\frac{J}{k}g*K.$