Saturated liquid ethane at T₁ = 14◦C is throttled into a steady-flow mixing chamber at the rate of 0.25 kmol/s. Argon gas at T₂ = 25◦C, 800 kPa, enters the chamber at the rate 0.75 kmol/s. Heat is transferred to the chamber from a constant temperature source at 150◦C at a rate such that a gas mixture exits the chamber at T₃ = 120◦C, 800 kPa. Find the rate of heat transfer and the rate of entropy generation.