Question

The diffusivity (D) in a binary gas mixture is related to the temperature (T) as ____

• A. \( D \propto T \)
• B. \( D \propto T^{0.5} \)
• C. \( D \propto T^{1.5} \)
• D. \( D \propto T^2 \)

Hint:

Use \( D \propto T^{1.5}/P \) for binary gas diffusivity estimations.

Answer 1

The Correct Option is C

From kinetic theory: \( D \propto \frac{T^{1.5}}{P} \).
Higher temperature increases molecular velocity, enhancing diffusion rate.