Chapter 9, Problem 62P

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# Glycerin in water diffuses along a horizontal column that has a cross-sectional area of 2.0 cm2. The concentration gradient is 3.0 × 10−2 kg/m4, and the diffusion rate is found to be 5.7 × 10−15 kg/s. Determine the diffusion coefficient.

To determine
The diffusion coefficient of glycerine.

Explanation
From Fickâ€™s law, the diffusion rate of glycerine is defined as Diffusionâ€‰rate=masstime=DA(C2âˆ’C1L) and the diffusion constant is D=Diffusionâ€‰rateA(C2âˆ’C1/L) . where (C2âˆ’C1)/L=Î”C/L is called as concentration gradient.

Given info: The cross-sectional area of the column is 2.0â€‰cm2 , the diffusion rate is 5.7Ã—10âˆ’15â€‰kg/s , and the concentration gradient is 3.0Ã—10âˆ’2â€‰kg/m4 .

The formula for the diffusion coefficient is,

D=Diffusionâ€‰rateA(Î”C/L)

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