Which one of the following characteristic is associated with adsorption?
$△ G$ is negative but $△ H$ and $△ S$ are positive
$△ G, △ H$ and $△ S$ all are negative
$△ G$ and $△ H$ are negative but $△ S$ is positive
$△ G$ and $△ S$ are negative but $△ H$ is positive

Question

Which one of the following characteristic is associated with adsorption?
$△ G$ is negative but $△ H$ and $△ S$ are positive
$△ G, △ H$ and $△ S$ all are negative
$△ G$ and $△ H$ are negative but $△ S$ is positive
$△ G$ and $△ S$ are negative but $△ H$ is positive

Toppr Admin · Accepted Answer

For adsorption- -x25B3-G-x25B3-H and -x25B3-S all are negative- Adsorption is a spontaneous process therefore change in free energy for the process is negative- Since adsorption is exothermic in nature- the enthalpy change is negative- The entropy change is negative because the adhering of gas molecules to the surface lowers randomness-

	Column I		Column II
a.	exothermic	p.	$H_{P} - H_{R}$
b.	endothermic	q.	$Δ H$ is negative
c.	spontaneous	r.	$Δ H$ is positive
d.	heat of reaction	s.	$Δ G$ is negative

Which one of the following characteristic is associated with adsorption?△G is negative but △H and △S are positive△G, △H and △S all are negative△G and △H are negative but △S is positive△G and △S are negative but △H is positive

Which one of the following characteristic is associated with adsorption?
$△ G$ is negative but $△ H$ and $△ S$ are positive
$△ G, △ H$ and $△ S$ all are negative
$△ G$ and $△ H$ are negative but $△ S$ is positive
$△ G$ and $△ S$ are negative but $△ H$ is positive