250 SCMM (standard cubic meters per minute) of ethylene at 150 ºC and 10 bar expands through a valve and is cooled in a heat exchanger. The gas exits the heat exchanger through an 18 cm ID pipe at an exit pressure of 1.4 bar and the exit temperature is 40 °C. Answer the following questions related to this process. a. Draw a picture of your system. Label all necessary items. Include units where appropriate. b. Perform a degree of freedom analysis on the system. c. What is the mole flowrate of ethylene? (mol/min) d. What is the specific volume at the exit conditions? (L/mol) e. What is the actual volumetric flow rate at the exit conditions? (m³/min) f. What is the downstream velocity? (m/s)

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