Determine the efficiency of the cycle, which makes one mole of nitrogen. The cycle consists of the following processes: Gibbs 1-2, 2-3 isothermal, isobaric and isothermal 3-4 4-1. Plot the cycle coordinates PV. Assume that P1 = P2 = 0.2 MPa, P3 = P4 = 0.1 MPa, V1 = 24 l, V2 = 48 l.

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