A saturated vapor of refrigerant 134a at 1000 kPa enters a nozzle with a negligible velocity. It leaves the nozzle at 500 kPa. What is the maximum velocity it could have, in m/s?
Hint: Remember that a nozzle does an energy conversion. The maximum velocity occurs when this is being done with the highest possible efficiency. What did you learn about entropy when efficiency is at a maximum?
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