The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an _________________ law?

Correct answer: A. Exponential

A. Exponential
B. Parabolic
C. Linear
D. Cubic

Explanation

For diffusion of one ideal gas through a stagnant second gas, integration of the flux equation gives a logarithmic relation in distance, so the partial-pressure profile is exponential rather than linear. A linear profile applies to equimolar counterdiffusion under the corresponding assumptions.

Written and checked by Zahid Hussain, MS Computer ScienceLast updated 18 September 2026

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