A piston reversibly and adiabatically contracts 3.88 moles of ideal gas to one-tenth of its original volume,

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Question:

A piston reversibly and adiabatically contracts 3.88 moles of ideal gas to one-tenth of its original volume, then expands back to the original conditions. It does this a total of five times. If the initial and final temperature of the gas is 27.5 C. calculate
(a) the total work and
(b) the total change in internal energy for the overall process.