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In the below equation, what does “D” represents?(a) Length of the membrane(b) Distance(c) Diffusion(d) Thickness of the membraneThe question was posed to me by my college director while I was bunking the class.My query is from Role of Diffusion in Bioprocessing topic in portion Mass Transfer of Bioprocess Engineering |
Answer» CORRECT option is (d) Thickness of the membrane The explanation is: It states that the rate of diffusion of a gas across a membrane is: ▪ Constant for a GIVEN gas at a given temperature by an EXPERIMENTALLY determined factor, K. ▪ Proportional to the surface area over which diffusion is taking place, A. ▪ Proportional to the difference in PARTIAL pressures of the gas across the membrane, P2 – P1. ▪ Inversely proportional to the distance over which diffusion must take place, or in other words the thickness of the membrane, D. |
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