A mixture undergoing multicomponent diffusion is analyzed through the Maxwell-Stefan approach. With regard to this approach which among the following statements are incorrect? The difference in the partial pressure of the Component A over a small distance ∆z (AB)is proportional to

The molar concentration at the two points.

Difference in the velocities at point A and B.

If all the components except 1 of the multicomponent diffusing mixture are inert, then what will be the expression for Diffusivity of the component 1 in the mixture?

D 1m =(N 1 -Y 1 ∑N j )/(∑(Y j N 1 -Y 1 N j )/D ij )

D 1m =(Y 1 ∑N j )/(∑(Y j N 1 -Y 1 N j )/D ij )

D 1m =N 1 /(∑[(Y j N 1 -Y 1 N j )/D ij ])

D 1m =(1-Y 1 )/(∑[Y j /D ij ])

A mixture of 60% hydrogen and 40% oxygen is blowing over a pan of water at 1atm pressure. The bulk gas temperature is 30°c and the water temperature is 20°C. The vapor pressure of water at this temperature is 17.53mm Hg. The concentration of moisture in the bulk gas is negligible and the diffusivity values are D O 2 -H2O=0.357cm2/s,DH2-H2O=0.972cm2/s at 34°C and DH2-O2=0.891cm2/s at 43°C. Q. Which of the following statements are correct?

Water vapor diffuses through non-diffusing hydrogen and oxygen.

Hydrogen and Oxygen is diffusing through water vapor.

Hydrogen is diffusing through water vapor and oxygen.

None of Hydrogen, Oxygen and water vapor is diffusing.

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