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An ideal gas initially at 600K and 10 bar undergoes a four-step mechanically reversible cycle in...

An ideal gas initially at 600K and 10 bar undergoes a four-step mechanically reversible cycle in a closed system. In step 12 (the process that changes the system from State 1 to State 2), pressure decreases isothermally to 3bar; in step 23, pressure decreases at constant volume to 2bar; in step 34 volume decreases at constant pressure; and in step 41, the gas returns adiabatically to its initial state. Take Cp=(7/2)R and Cv=(5/2)R.

Determine the efficiency of the cycle. (Hint: η=W/Q)

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