This is a modified Stirling cycle. The Stirling engine never caught on due to industrial limitations. N2 gas, a diatomic molecule, is the working material. Process 1 to 2 is isothermal. 2 to 3 is a vertical line. 3 to 4 is adiabatic (this is the modification). 4 to 1 is a vertical line. P, = 2.750 x 10 pa V, = 3.00 x 103 m3 T 220.0 °C T3 20.0 °C T4 = 50.0 °C %3D %3D %3D 7 Y diatomic gas

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