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A molecule in a mixture moves with a velocity of 0.03m/s in (+x) direction. The concentration of the particle is 0.5 mol/liter. A observer is running in (-x) direction with a velocity of 2m/s. calculate the value of molar flux (mol/m2.s) relative to the observer.

(a) 0.015

(b) 15

(c) 1.015

(d) 1015

I had been asked this question by my college director while I was bunking the class.

Enquiry is from Concentration and Velocity in division Modes and Diffusion of Mass Transfer

1 Answer

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by (39.8k points)
Right answer is (d) 1015

For explanation: Molar flux with respect to observer= C(u-U)

                                               (C=500mol/m3, u=0.03m/s, U= (-) 2m/s).

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