Question
Question: Which one of the following characteristics is not correct for physical adsorption?...
Which one of the following characteristics is not correct for physical adsorption?
A
Adsorption on solids is reversible
B
Adsorption increases with increase in temperature
C
Adsorption is spontaneous
D
Both enthalpy and entropy of adsorption are negative.
Answer
Adsorption increases with increase in temperature
Explanation
Solution
Since the physical adsorption process is exothermic, the physical adsorption occures readily at low temperature and decreases with increasing temperature. (Le Chatelier’s principle).