An open feedwater heater in a power plant heats 4 kg/s water at 45◦C, 100 kPa by mixing it with steam from the turbine at 100 kPa, 250◦C, as in Fig. P4.107. Assume the exit flow is saturated liquid at the given pressure and find the mass flow rate from the turbine.

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1 3 Mixing chamber FIGURE P4.107