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Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m 3 . The diffusivity of aniline in air is 0.74xl0 -5 m 2 /s.The numerical value of mass transfer co-efficient is 7.4 x 10 -3 . Its units are

 


Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3 . The diffusivity of aniline in air is 0.74xl0-5m2/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are

Grade:Upto college level

1 Answers

Athira Kocher
24 Points
4 years ago
Mass transfer coefficient is the ratio of  diffusivity to thickness of stagnant layer(by film theory).
Since unit of diffusivity is  m2/s and thickness m then unit of mass transfer coefficient is m/s.
 

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