Question

g There are two substances, 1 and 2, that diffuse across identical surface areas. The substances have diffusion constants D1 and D2, and D1 > D2. The substances have identical concentration gradients. Which substance will diffuse at a faster rate

Answer 1

Substance 1 will diffuse at a faster rate.

Step-by-step explanation:

We can solve this problem by keeping in mind Fick's law, which states:

• J = -D * (dc/dx)

Where:

• J is the flux

• D is the diffusion constant

• (dc/dx) is the concentration gradients

As (dc/dx) is equal for both substances, as stated by the problem, the substance with the higher diffusion constant will diffuse at a faster rate.

Thus the answer is substance 1.