Question

In Langmuir's model of adsorption of a gas on a solid surface

• A. The rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered
• B. The mass of gas striking a given area of surface is independent of the pressure of the gas
• C. The mass of gas striking a given area of surface is proportional to the pressure of the gas
• D. The adsorption at a single site on the surface may involve multiple moloecules at the same time

Answer 1

The correct option is C The mass of gas striking a given area of surface is proportional to the pressure of the gas

In Langmuir's adsorption isotherm, the mass of gas striking a given area of surface is proportional to the pressure of the gas as
$\frac{x}{m}=\frac{kp}{1+kp}$