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Surface Chemistry
Answer:
As adsorption is exothermic. it leads to a decrease in the residual force on the surface of the adsorbent. This cause a decrease in the surface energy of the adsorbent. When gas is adsorbed on the surface of solid entropy decrease, i.e., ΔS = –ve. Since ΔH = –ve, ΔS= –ve, for adsorption to be spontaneous AG must be negative [ΔG = ΔH – TΔS].
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In Haber's process, hydrogen is obtained by reacting methane with steam in presence of NiO as catalyst. The process is known as steam reforming. Why is it necessary to remove CO when ammonia is obtained by Haber’s process?
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