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Steam expands in an turbine adiabatically from P1 = 3 MPa and T1 = 400C to P2 = 0.2 MPa. If the steam is exhausted

Steam expands in an turbine adiabatically from P1 = 3 MPa and T1 = 400°C to P2 = 0.2 MPa. If the steam is exhausted as a saturated vapor, what is the isentropic efficiency of the turbine? Draw the T–s diagram indicating the states

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