Determine the efficiency of the cycle that makes a kilomole of an ideal monatomic gas. The cycle consists of the following processes: adiabatic 1-2, isobaric 2-3 and isochoric 3-1. Construct a cycle graph in P-V coordinates. In this case, P1 = 0.4 MPa; V1 = V3 = 20 l, V2 = 40 l.

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