In Langmuir's model of adsorption of a gas on a solid surface
(1)the rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered
(2)the adsorption at a single site on the surface may involve multiple molecules at the same time
(3)the mass of gas striking a given area of surface is proportional to the pressure of the gasCorrect
(4)the mass of gas striking a given area of surface is independent of the pressure of the gas
Answer: (3)
Solution
In Langmuir's model the rate of adsorption is proportional to the rate at which gas molecules strike the surface, which (from kinetic theory) is proportional to
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