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1. Steam enters the turbine of a Rankine cycle power plant at 12.0 MPa and 400.°C. How much does the isentropic thermal efficiency increase if the condenser pressure is lowered from 0.100 to 1.00 × 10^-3 MPa?

2. Steam enters the turbine of a Rankine cycle power plant at 200. psia and 500.°F. How much does the isentropic thermal efficiency increase if the condenser pressure is lowered from 14.7 to 1.00 psia?

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