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What is meant by adsorption or absorption?

Answer»
 Criteria CriteriaAbsorptionAdsorption
DefinitionAssimilation of the molecular system throughout the bulk of the solid or liquid medium.Accumulation of molecular species at the bottom instead of the liquid or solid.
PhenomenonA bulk phenomenon.A surface phenomenon.
Heat exchangeEndothermic processExothermic process
TemperatureThe temperature has no effect.Influenced by low temperature
Rate of reactionOccurs at a uniform rate.Increases steadily and reaches equilibrium.
ConcentrationIt is constant throughout the medium.The Concentration at the bottom of adsorbent is different from that in bulk.


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