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28 moles of an ideal gas with a molar specific heat at constant volume of cv=3.2R...

28 moles of an ideal gas with a molar specific heat at constant volume of cv=3.2R is initially in state "A" at pressure 73390 Pa and volume 1.0 m3.

The gas then expands isobarically to state "B" which has volume 2.6?3m3.

The gas then cools isochorically to state "C".

The gas finally returns from state "C" to "A" via an isothermal process.

What is the adiabatic constant γ for this gas?

What is Q during the expansion from "A" to "B"? Answer in Joules.

What is the work done during the contraction from "C" to "A"? Answer in Joules.

What is the efficiency ?e of this cyclic process?

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