Two ideal gas (with gas constant 0.287 kJ/kg.K) flows are combined to a single flow in a mixing chamber. One flow is 1 m3/s at 20 °C and the other flow is 2 m3/s at 200 °C, both at 100 kPa. They mix without any heat transfer to produce an exit flow at 100 kPa. Neglect kinetic energies and find the exit temperature and volume flow rate. Assume the gas has almost constant specific heats at temperatures 20°C to 200°C.