Chemical Engineering - Mass Transfer - Discussion
Discussion Forum : Mass Transfer - Section 12 (Q.No. 48)
48.
Unit of molal diffusivity is
Discussion:
3 comments Page 1 of 1.
Shyam prasad said:
3 years ago
For equimodal Counter diffision.
N A = (D AB/ Z 1) *(CA l -CA 2).
Where N A is the molal diffusivity of gases.
DAB is mass transfer coefficient-- cm^2/sec,
Z L is the distance travelled by molecule --cm,
CA 1 unit moles/cm^3.
So, finally molal diffusivity units is gmole/(cm^2 .sec).
N A = (D AB/ Z 1) *(CA l -CA 2).
Where N A is the molal diffusivity of gases.
DAB is mass transfer coefficient-- cm^2/sec,
Z L is the distance travelled by molecule --cm,
CA 1 unit moles/cm^3.
So, finally molal diffusivity units is gmole/(cm^2 .sec).
Dharmendra kumar said:
3 years ago
Answer D is the correct answer.
(1)
TANMAY SHAH said:
2 years ago
@Shyam.
NA is the molar flux, not the molal diffusivity.
NA is the molar flux, not the molal diffusivity.
(3)
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