Physical absorption and chemical absorption are two types of absorption processes; the chemical reaction is dependent between solvent and solute.
Including the bulk properties of a liquid, solid or gas is a phenomenon of absorption. It includes the molecules or atoms that pass the surface and entering the material volume.
Physical absorption:
Physisorption or physical adsorption is a kind of adsorption that takes place in contact with a solid or liquid surface for most particles.
Chemical absorption:
Chemical absorption is a chemical reaction process among the absorbing substances and absorbed substances, it occurs when the molecules or atoms are absorbed.
Here are some points of difference between Physical and Chemical Absorption.
Physical Absorption
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Chemical Absorption
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It is a reversible process of absorption
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It is an irreversible process of absorption
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Equilibrium is achieved easily
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Equilibrium is achieved gradually
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Due to the forces of intermolecular van der Waal’s, physical absorption occurs
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Due to the chemical bond formation, Chemical Absorption occurs
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Less Heat of adsorption
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The heat of adsorption is very large
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Decreases with temperature rise
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Increase with temperature rise
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Increased pressure increases adsorption
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The decrease in pressure doesn’t lead to desorption
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Adsorbed easily if the gases are liquefiable easily, it depends on the nature of the gas.
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Significantly specific and relies on the nature of the adsorbent and adsorbate
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On the adsorbent surface, the multimolecular layers are formed
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On the adsorbent surface, the unimolecular layers are formed
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Difference between Physical and Chemical Properties
Difference between Physical and Chemical change
Difference between Physical Adsorption and Chemical Adsorption
Difference between Absorption and Adsorption
Difference between miscible and immiscible
Difference between Solubility and Miscibility
Difference between Diffusion and Effusion
Difference between Diffusion and Osmosis
Difference between pH paper and universal indicator
Difference between pH paper and litmus paper
Difference between pH meter and pH paper
Difference between blue and red litmus paper
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