For the following two questions, consider pure helium gas passing through a 1meterlong plastic pipe. The...
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For the following two questions, consider pure helium gas passing through a 1meterlong plastic pipe. The outer radius of the pipe is 1 cm, and the inner radius is 0.8 cm. The pipe has a temperature of 80°C and is surrounded by air. Chemical analysis of the air surrounding the pipe shows that in a steady state, 1105 mol of helium diffuses through the pipe each second. When the pipe is replaced, a microprobe analysis shows the helium concentration at r = 0.8 cm, cHe = 0.012 mol/cm3, and at r = 1.0 cm, cHe = 0.0002 mol/cm3. Calculate the flux of He through the plastic pipe at the outer surface in units of 1010 mol/cm2/s Calculate the diffusion coefficient of He in the plastic pipe in units of 108 cm2/s. For the following two questions, consider pure helium gas passing through a 1meterlong plastic pipe. The outer radius of the pipe is 1 cm, and the inner radius is 0.8 cm. The pipe has a temperature of 80°C and is surrounded by air. Chemical analysis of the air surrounding the pipe shows that in a steady state, 1105 mol of helium diffuses through the pipe each second. When the pipe is replaced, a microprobe analysis shows the helium concentration at r = 0.8 cm, cHe = 0.012 mol/cm3, and at r = 1.0 cm, cHe = 0.0002 mol/cm3. Calculate the flux of He through the plastic pipe at the outer surface in units of 1010 mol/cm2/s Calculate the diffusion coefficient of He in the plastic pipe in units of 108 cm2/s.
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Income Tax Fundamentals 2015
ISBN: 9781305177772
33rd Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven Gill
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