Water at 140 kPa and 280 K enters a mixing chamber at a rate of 2 kg/s,

Question:

Water at 140 kPa and 280 K enters a mixing chamber at a rate of 2 kg/s, where it is mixed steadily with steam entering at 140 kPa and 400 K. The mixture leaves the chamber at 140 kPa and 320 K, and heat is lost to the surrounding air at 20oC at a rate of 3 kW. Determine (a) The reversible work and
(b) The rate of exergy destruction (I).