Steam enters a turbine at 2 MPa, 400°C, at 60 m/s. The steam exits at 20 kPa, quality 85%, at 150 m/s. The turbine loses heat at a rate of 250 kJ/s. Calculate the mass flow rate if the turbine is required to produce 100 MW of mechanical work.
a) 25 kg/s
b) 50 kg/s
c) 75 kg/s
d) 100 kg/s