An adiabatic mixing chamber is fed by two steam inlet flows. The first flow has a mass flow rate of 18 kg/s and enters at 500 kPa and 1300°C, while the second flow has a mass flow rate of 2 kg/s and enters at 1000 kPa and 200°C. After mixing, the exit flow is throttled down to 500 kPa. Choose the correct answer for each question from the provided options:
a. What is the specific enthalpy of the exit flow?
b. Is there any heat transfer in the mixing chamber?
c. What is the exit flow temperature?
d. What is the exit mass flow rate?