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why the freedom of gas is restricted when it is adsorbed.?and why delta h becomes less and less negative during adsorption process

why the freedom of gas is restricted when it is adsorbed.?and why delta h becomes less and less negative during adsorption process

Grade:12

2 Answers

Vikas TU
14149 Points
7 years ago
From dG = dH –  TdS
molecules looses degree of freedom.
but entropy of adsorption is negative,
enthalpy change is negative and the processis exothermic.
Umakant biswal
5349 Points
7 years ago
@ adyasha 
actually adsorption means the gas particle will be stick to the solid surface due to the uneven distribution of the particle in the solid state , and for that the solid surface will exert a force , and due to the low intermolecular attraction  between the particles of gas , they will not tend to remove from the surface and they will be remain attached their . 
due to that their freedom of movement will be restricted . 
and the process is exothermic due to liberation of heat when the gaseous particle will attach in the surface of solid adsorbate . 
HOPE IT CLEARS YOU 
ALL THE BEST ..

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