Air that initially occupies 0.25 m3 at a gauge pressure of 110 kpa is expanded isothermally to a pressure of 101.3 kpa and then cooled at constant pressure until it reaches its initial volume. compute the work done by the air. (gauge pressure is the difference between the actual pressure and atmospheric pressure.)

W = 234 J

Explanation:

Initial volume of air is given as

finally it is expanded isothermally to new pressure of 101.3 kPa

now by isothermal expansion we know

So work done in above process is given as

Now it is cooled to initial volume at constant pressure

so here in this case work done is given as

Now total work done is given as

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