One kmol/sec of helium (He) at 25°C, 4 bar enters an insulated chamber at steady state as shown in the figure below, where it mixes with nitrogen (N2) entering as a separate stream at 277°C, 4 bar. The mixture exits at 3.8 bar with the molar analysis 45% He, 55% N2. Kinetic and potential energy effects can be ignored. He 298 K 1 4 bar N₂ 550 K 4 bar 2 Step 1 Determine the temperature of the exiting mixture, T3, in °C. 3 T3, 3.8 bar