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In a thermal power plant, super heated steam at 400 C and 80 bar is expanded adiabatically in a turbine. If the isentropic shaft work

In a thermal power plant, super heated steam at 400 C and 80 bar is expanded adiabatically in a turbine. If the isentropic shaft work is 137 kJ/kg, what would be the actual work in kJ/kg created by the turbine for an efficiency of 0,8

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