Question

If x is amount of adsorbate and m is amount of
adsorbent, which of the following relations is
not related to adsorption process ?
(a) x / m = ???? (p) at constant T.
(b) x / m =???? (T) at constant p.
(c) p = ???? (T) at constant (x / m).
(d) x= p x T
m

Answer 1

Answer :- (c) p = ???? (T) at constant (x / m).

Answer 2

(d) x/m = p × T is not related to the adsorption process.

Explanation:

• The Freundlich adsorption isotherm is given by the equation:

x/m = kp¹⁾ⁿ

• The Langmuir adsorption  isotherm is given by the equation:

x/m = bp/(1 + bp)

• The adsorption isobars and adsorption isotherms are plotted when either temperature or pressure is constant.
• It cannot be plotted when both pressure and temperature is constant. Thus, option (c) is not related.