In a desuperheater, liquid water at 3,100 kPa and 50oC is sprayed into a stream of superheated steam at 3,000 kPa and 375oC in an amount such that a single stream of saturated-vapor steam at 2,900 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 G for the process? What is the irreversible feature of the process?