Briefly discuss the major limitations of the Langmuir equation for describing theadsorption of a gas on a solid interface. Furthermore, describe under what conditionsit is useful Briefly discuss the validity

of each of the following two statements and includereasons The value for the surface area of a solid measured by gas adsorption isindependent of the identity of the gas used. Emulsions areinherently unstable, but can be made more stable by addingsurfactant.

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