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 adsorption at a single site on the surface may involve multiple molecules at the same time
• C. the mass of gas striking a given area of surface is proportional to the pressure of the gas
• D. the mass of gas striking a given area of surface is independent of the pressure of the gas

Answer 1

Answer: (C)

the mass of gas striking a given area of surface is proportional to the pressure of the gas

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