Q. Which plot is the adsorption isobar for chemisorption where is the amount of gas adsorbed on mass ‘’ (at constant pressure) at temperature ?

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Solution:

Adsorption isobar is a graph between the amount adsorbed and the temperature of the adsorbate at constant pressure.
The chemisorption isobar shows an initial increase in with temperature and then expected decrease, which is because of the heat supplied, acts as activation energy.