Two moles of an ideal gas undergo a cyclic transformation consisting of the following three reversib

Question

Two moles of an ideal gas undergo a cyclic transformation consisting of the following three reversible processes: Process A ($1 ightarrow 2$): Reversible isobaric expansion from state 1 ($1.0	ext{ atm}, 20.0	ext{ L}$) to state 2 ($1.0	ext{ atm}, 40.0	ext{ L}$). Process B ($2 ightarrow 3$): Reversible isochoric depressurization from state 2 ($1.0	ext{ atm}, 40.0	ext{ L}$) to state 3 ($0.5	ext{ atm}, 40.0	ext{ L}$). Process C ($3 ightarrow 1$): Reversible isothermal compression from state 3 ($0.5	ext{ atm}, 40.0	ext{ L}$) back to state 1 ($1.0	ext{ atm}, 20.0	ext{ L}$).

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See detailed solution for explanation.