In a desuperheater, liquid water at 3100 kPa and 323.15 K (50°C) is sprayed into a stream of superheated steam at 3000 kPa and 648.15 K (375°C) in an amount such that a single stream of saturated-vapor steam at 2900 kPa flows from the desuperheater at the rate of 15 kg s-1. Assuming adiabatic operation, what is the mass flowrate of the water? What is SG for the process? What is the irreversible feature of the process?