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Adsorption of gases on solid surface is exothermic because:
- a)Enthalpy is positive
- b)Entropy decreases
- c)Entropy increases
- d)Free energy increases
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Adsorption of gases on solid surface is exothermic because:a)Enthalpy ...
- The process of adsorption includes the following steps:
- Diffusion of reactants on the surface of the solid catalyst.
- Adsorption of the reactants on the surface.
- Reaction on the surface
- Desorption of the products from the surface and
- Diffusion of products away from the surface.
- During the process of adsorption, the molecules which were free get adhered to the surface of the catalyst and become bound by attraction.
- From a free state, they go into a restricted state, and thus the entropy of particles decreases.
- As entropy decreases, the molecules become more stable or less in energy, and thus the excess energy is released in the form of heat, which makes the process exothermic in nature.
Hence, the adsorption of gases on solid surface is exothermic because the entropy decreases.
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Adsorption of gases on solid surface is exothermic because:a)Enthalpy is positiveb)Entropy decreasesc)Entropy increasesd)Free energy increasesCorrect answer is option 'B'. Can you explain this answer?
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