The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp= M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force) ?
Correct answer: C. Kc = Kp . RT = Km . RT/p
- A. Kc = Kp = Km
- B. Kc = Kp/RT = Km . RT/P
- C. Kc = Kp . RT = Km . RT/p
- D. None of these
Explanation
For an ideal gas, concentration is related to pressure by C = p/RT, while mole fraction is related by y = p/P. Hence Kc = KpRT and Km = KpP, giving Kc = KpRT = KmRT/P, as represented by option c.
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