Oxygen (model it as a perfect gas) is throttled by an insulated valve. At the inlet, the

Question:

Oxygen (model it as a perfect gas) is throttled by an insulated valve. At the inlet, the conditions are: 500 kPa, 300 K, 10 m/s, 1 kg/s. At the exit the conditions are: 200 kPa, 30 m/s. Determine.
(a) The exit area.
(b) The temperature at the exit. Assume steady state with no heat or external work transfer, and constant specific heats. Neglect any change in ke or pe.