Browse Questions

$(a)\;exothermic\;process\qquad(b)\;endothermic\;process\qquad(c)\;may\;be\;exothermic\;or\;endothrermic\qquad(d)\;neither\;exothrmic\;nor\;endothermic$

Explanation :
Adsorption is generally accompanied by decrease in randamness i.e , $\;\bigtriangleup S\;$ for the process is - ve . As
$+ \bigtriangleup G = \bigtriangleup H - T \bigtriangleup S$
$(-ve) = \bigtriangleup H - (+ve) (-ve)$
$\bigtriangleup H = (-ve)$
Therefore , for adsorption , $\; \bigtriangleup H\;$ is generally -ve i.e , process is generally exothermic .