Pure N2 gas at 1 atm and 25°C is flowing through a 10-m-long, 3-cm-inner diameter pipe mad...

Pure N2 gas at 1 atm and 25°C is flowing through a 10-m-long, 3-cm-inner diameter pipe made of 2-mm-thick mbber. Determine the rate at which N, leaks out of the pipe if the medium surrounding the pipe is (a) a vaeuum and (b) atmospheric air at 1 atm and 25°C with 21 percent O2 and 79 percent N2. Answers: (a) 2.28 × 10-10 kmol/s, (b) 4.78 × 10–11 kmol/s