Steam enters one side of a mixing chamber at a pressure of 60 psia and a temperature of 350oF (State 1). Water with a mass rate of flow of 22 lbm/s enters the other side of the mixing chamber at a pressure of 60 psia and a temperature of 290oF (State 2). Water leaves the mixing chamber as a saturated liquid at a pressure of 60 psia (State 3). The mixing chamber loses heat at a rate of 9.35 Btu/s from its surfaces to the surroundings. The average surface temperature of the mixing chamber is 130oF. Find the entropy generation (Btu/s·°R) for the mixing chamber