An insulated mixing chamber receives 2 kg/s R-134a at 1 MPa, 100°C in a line (state-3). Another line brings 1 kg/s of R-134a as saturated liquid at 70°C (state-1), which is throttled to a pressure of 1 MPa (state-2) before it enters the mixing chamber. At the exit (state-3) the pressure is 1 MPa. Determine.
(a) The temperature at the exit.
(b) The entropy generated by the valve.
(c) The entropy generated by the mixing chamber.
(d) The entropy generated in the system's universe.