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Which statement accurately describes the Freundlich Adsorption isotherm?

1. x/m depends on temperature when T is constant.
2. x/m depends on pressure when T is constant, and pressure depends on temperature when x/m is constant.
3. x/m is directly proportional to the product of pressure and temperature.
4. x/m depends on pressure when temperature is held constant.

Correct answer: x/m depends on pressure when temperature is held constant.

Solution

Freundlich Adsorption Isotherm states that the amount of adsorbate adsorbed per unit mass of adsorbent (x/m) is a function of pressure (P) at constant temperature (T).

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