1.

Which of the following is the correct illustration of rate of mass transfer?

A. r= k<sub>y</sub> a(y-y 1 ) =k<sub>x</sub> a(x-x 1 )
B. r= k<sub>y</sub> a(y 1 -y) =k<sub>x</sub> a(x 1 -x)
C. r= k<sub>y</sub> a(y-y 1 ) =k<sub>x</sub> a(x 1 -x)
D. r= a(y-y 1 ) =a(x 1 -x)
Answer» D. r= a(y-y 1 ) =a(x 1 -x)


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