An ideal gas initially at 650 K and 9 bar undergoes a four-step mechanically reversible cycle in a closed system. In ste

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An ideal gas initially at 650 K and 9 bar undergoes a four-stepmechanically reversible cycle in a closed system. In step 12,pressure decreases isothermally to 3 bar; in step 23, pressuredecreases at constant volume to 2 bar; in step 34, volume decreasesat constant pressure; and in step 41, the gas returns adiabaticallyto its initial state. Take Cp = (7/2)R and Cy = (5/2)R.
(a) Sketch the cycle on a PV diagram.
(b) Determine (where unknown) both T and P for states 1, 2, 3,and 4.
(c) Calculate Q, W, AU, and AH for each step of the cycle.