250 scmm standard cubic meters per minute of ethylene at 150 oc and 10
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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