I am a second year engineering student out on my first co-op work term. My supervisor's first task for me was to calculate the flow rate of one of his parts that he will use on a system that he is designing. I hooked up the part to a compressed nitrogen tank initially at 6,000psi. I cracked open a valve for 20 seconds and allowed the nitrogen to bleed out of the tank without any restriction except for what was flowing through the part. After 20 seconds, I closed the valve and read the pressure to be 2600psi. I tried to calculate the flow rate using PV=znrt but I got an extremely high flow rate of 28,000L/min. I don't think that this flow rate is correct. Am I approaching the problem the right way with using the ideal gas law?? any suggestions??? Thanks in advance. This is what I know (my supervisor says that this is all the info that I need to calculate the flow rate): Initial pressure: 6000psi Final pressure: 2600psi Time for pressure drop: 20 seconds Nitrogen tank volume: 42liters Test was done at 25 degrees C inside diameter of part: 3/8"