Water at 20 MPa and 60 degrees celcius enters a mixing chamber at a rate of 280lbm/min, where it is mixed steadily with steam entering at 20psia and 230 degrees Farenheight at a rate of 25lbm/min. The mixture leaves the chamber at 20 psia and 150 degrees Farenheight and heat being loss at 100 degrees Farenheight to the surrounding air at T0= 70 degrees Farenheight. Caculate this heat loss in Btu/min. Neglecting KE and PE, determine the irreversibility for this process in Btu/min.