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A system undergoes three quasi-static pr...

A system undergoes three quasi-static process sequentially as indicated in Fig. 1-2 is an isobaric process, 2-3 is a polytropic process with `gamma = 4//3` and 3-1 is a process in which `PV` = constant. `P_(2) = P_(1) = 4 xx 10^(5) N//m^(2), P_(3) = 1 xx 10^(5) N//m^(2)` and `V_(1) = 1 m^(3)`.
The heat transfer for the cycle is `Delta Q`, the change in internal energy is `Delta U` and the work done is `Delta W`. Then

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